THE PAYMENT OF THIS INSTRUMENT, BOTH PRINCIPAL AND INTEREST, AND ALL OTHER 
INDEBTEDNESS EVIDENCED HEREBY, IS SUBJECT TO THE PRIOR RIGHTS OF THE 
COMPANY'S SENIOR LENDERS (AS DEFINED HEREIN).

THE SECURITIES REPRESENTED BY THIS DEBENTURE HAVE NOT BEEN REGISTERED UNDER 
THE SECURITIES ACT OF 1933 OR APPLICABLE STATE SECURITIES LAWS, AND MAY NOT 
BE SOLD, ASSIGNED, OFFERED, PLEDGED OR OTHERWISE TRANSFERRED FOR VALUE EXCEPT 
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT AND SUCH LAWS 
COVERING SUCH SECURITIES OR UNLESS THE ISSUER RECEIVES AN OPINION OF COUNSEL 
ACCEPTABLE TO THE ISSUER STATING THAT SUCH SALE, ASSIGNMENT, PLEDGE OR 
TRANSFER IS EXEMPT FROM THE REQUIREMENTS OF SUCH ACT AND SUCH LAWS.

            Series 1997 10% Subordinated Convertible Debenture
                          Due ____________, 2004




No. 1997/10-______________                                   $________________
Chicago, Illinois                                        _______________, 1997



      KNOW ALL PERSONS BY THESE PRESENTS that TRO Learning Inc., a Delaware 
corporation (the "Issuer"), for value received, promises to pay to 
___________________________, or registered assignee (the "Holder"), the 
principal sum of ____________________Dollars ($_____________) on 
______________, 2004 (or at an earlier redemption date as provided for 
herein), together with interest on said principal amount from the date hereof 
until the principal amount is paid at the rate of ten percent (10%) per 
annum, compounded annually (this "Debenture"). Interest will be paid on
July 1, and January 1 of each year, commencing July 1, 1997. Principal shall be 
payable at the office of the Issuer upon representation and surrender of this 
Debenture. Interest shall be paid by Issuer's check payable to the person 
listed as the registered owner of the Debenture on any interest payment date 
on the Debenture register maintained by the Issuer, and mailed on each 
interest payment date (other than a date which is a principal payment date) 
to said registered owner at the address shown on said Debenture register.

      1.  DEFINITIONS.

      Certain terms used herein and not otherwise defined (including 
capitalized terms used in the foregoing Recitals) shall have the following 
meanings:

      "CONVERSION PRICE" shall have the meaning set forth in Section 4(b) 
hereof.

 



      "ISSUER OBLIGATION" means the Senior Secured Obligations or the 
Subordinate Obligations, as the context requires.

      "PAYMENT IN FULL" or "PAID IN FULL" or any similar term(s) with respect 
to any Issuer Obligation means (a) the satisfaction and final payment in full 
of such Issuer Obligation in cash or cash equivalents reasonably acceptable 
to the payee, the termination of any obligation on the part of the holder of 
such Issuer Obligation to make any future loans or to afford any further 
financial accommodation to Issuer, and the full and timely performance of all 
obligations, or (b) in the case of any Issuer Obligation consisting of 
contingent obligations (including without limitation contingent obligations 
in respect of letters of credit or other indemnifications under the Senior 
Loan Documents), the setting apart of cash sufficient to discharge such 
portion of such Issuer Obligation in an account for the exclusive benefit of 
the holders thereof, in which account such holders shall be granted by Issuer 
a first priority perfected security interest in a manner acceptable to such 
holders, which payment or perfected security interest shall have been 
retained by the holders, in the case of each of (a) and (b) above, for a 
period of time in excess of all applicable preference or other similar 
periods under applicable bankruptcy, insolvency or creditors' rights law.

      "SENIOR LENDER" means Sanwa Business Credit Corporation and its 
successors and assigns and/or any other lender under a Senior Loan Agreement.

      "SENIOR LOAN AGREEMENT" means that certain Amended and Restated Loan 
and Security Agreement dated effective as of March 5, 1997, among the Senior 
Lender, The Roach Organization, Inc. and TRO Learning (Canada), Inc., as the 
same may hereafter be amended, supplemented, modified, replaced or refinanced 
from time to time and/or any other agreement for secured indebtedness 
refinancing or replacing such credit agreement in whole or in part.

      "SENIOR LOAN DOCUMENTS" means the Senior Loan Agreement and all other 
instruments, agreements and documents which create, evidence or secure the 
Senior Secured Obligations from time to time (including but not limited to 
any promissory notes, security agreements, guarantees, pledge agreements, 
hypothecation agreements, mortgages, financing statements, and all other 
agreements of any type whatsoever), delivered by Issuer, any guarantor or any 
other person or entity, as any of the same may be amended, supplemented, 
modified, replaced or refinanced by the Senior Lender from time to time.

      "SENIOR SECURED OBLIGATIONS" means all "Liabilities" as that term is 
defined in the Senior Loan Documents owing to the Senior Lender, including 
but not limited to principal, interest, fees and all other amounts owing to 
the Senior Lender under the Senior Loan Documents, from time to time. There 
is no limitation on the amount of Senior Secured Obligations that Issuer can 
incur.

      "SUBORDINATE CONVERTIBLE DEBENTURES" means those debentures of the 
Issuer designated as its Series 1997 10% Subordinated Convertible Debentures 
in the aggregate amount up to $7,000,000, also referred to herein as 
"Debentures".


                                     2






    "SUBORDINATE OBLIGATIONS"  means all principal, interest, fees and all 
other amounts owing to the Holder under the Subordinate Convertible Debentures 
from time to time, whether in respect of principal, interest or otherwise.

    2.  SERIES.

    This Debenture is one of the Subordinate Convertible Debentures. All 
payments with respect to the Debentures shall be made to all holders of the 
Debentures PRO RATA, based upon amounts then due or owing.

    3.  REDEMPTION.

        (a)  Except as set forth herein, this Debenture may not be prepaid or 
    redeemed.

        (b)  This Debenture may be redeemed by the Issuer, at its option, in 
    whole or in part, if (i) the closing bid price of a single share of the 
    Issuer's Common Stock, as reported in the principal market upon which the 
    Issuer's public registered Common Stock is traded, is at least 200% of the 
    Conversion Price for twenty consecutive trading days; (ii) the average 
    daily trading volume of the Issuer's Common Stock for such twenty day 
    period is not less than 40,000 shares; and (iii) the shares into which the 
    Debentures are convertible are subject to an effective registration 
    statement under the Securities Act of 1933 (the "Securities Act") or are 
    saleable under Rule 144(k) thereunder. In the event of a redemption 
    pursuant to this Section 3(b), the Issuer shall redeem this Debenture at 
    101% of the principal sum stated herein, together with all interest accrued
    and unpaid on said principal sum to the date of redemption.

        (c)  The Issuer shall redeem Debentures representing at least 25% of 
    the total principal amount of this Series, on a pro rata basis, on each of
    March ___, 2001, 2002, 2003 and 2004.

        (d)  In the event of any redemption under Section 3(b) or Section 3(c),
    the Issuer shall provide a notice of redemption (the "Redemption Notice") to
    the registered Holder of this Debenture, at the address shown on the
    Issuer's Debenture register. If conversion is not elected in accordance with
    Section 4, the redemption shall take place on the date specified in the
    Redemption Notice, which shall not be earlier than 30 days subsequent to the
    date of the Redemption Notice (a "Redemption Date"). On a Redemption Date,
    this Debenture, if redeemed in whole, shall be deemed cancelled, null and
    void and of no further force and effect, provided that the Issuer pays to
    the holder hereof the redemption price. In the event of a partial
    redemption of this Debenture, the holder of this Debenture shall submit this
    Debenture to the Issuer, which shall make a notation on the face of this
    Debenture as to the amount which has been redeemed and, with respect to such
    amount redeemed, this Debenture shall be cancelled, null and void and of no
    further force and effect, provided that the Issuer pays the redemption
    price for the amount of this Debenture so redeemed.

                                      3



4.  CONVERSION.

    (a)  This Debenture may be converted into shares of the Issuer's Common 
Stock, at the option of the holder, in whole but not in part, at the 
Conversion Price. No fractional shares of Common Stock shall be issued. Upon 
conversion of this Debenture, fractional shares, if applicable, shall be paid 
in cash based on the Conversion Price.

    (b)  For purposes hereof, the term "Conversion Price" shall mean 
initially $_______per share. [120% of the average closing bid price for the 
twenty days prior to closing], and shall be subject to adjustment, as follows:

         (i)   In case the Issuer shall at anytime hereafter subdivide or 
    combine the outstanding shares of Common Stock or declare a dividend 
    payable in Common Stock, the Conversion Price in effect immediately prior
    to the subdivision, combination or record date for such dividend payable in
    Common Stock shall forthwith be proportionately increased, in the case of 
    combination, or decreased, in the case of subdivision or dividend payable 
    in Common Stock, and each share of Common Stock issuable upon conversion of
    this Debenture shall be changed to the number determined by dividing the 
    then current Conversion Price by the Conversion Price as adjusted after the
    subdivision, combination, or dividend payable in Common Stock.

         (ii)  If any capital reorganization or reclassification of the 
    capital stock of the Issuer, or consolidation or merger of the Issuer with
    another corporation, or the sale of all or substantially all of its 
    assets to another corporation shall be effected in such a way that holders
    of Common Stock shall be entitled to receive stock, securities or assets
    with respect to or in exchange for Common Stock, then, as a condition of
    such reorganization, reclassification, consolidation, merger or sale, lawful
    and adequate provision shall be made whereby the holder hereof shall
    hereafter have the right to receive upon the basis and upon the terms and
    conditions specified in this Debenture and in lieu of the shares of the
    Common Stock of the Issuer into which this Debenture was immediately
    theretofore convertible, such shares of stock, securities or assets as may
    be issued or payable with respect to or in exchange for a number of
    outstanding shares of such Common Stock equal to the number of shares of
    such stock into which this Debenture was immediately theretofore convertible
    had such reorganization, reclassification, consolidation, merger or sale not
    taken place, and in any such case appropriate provisions shall be made with 
    respect to the rights and interests of Holder to the end that the 
    provisions hereof (including without limitation provisions for adjustments 
    of the Conversion Price and of the number of shares into which this 
    Debenture may be converted) shall thereafter be applicable, as nearly as 
    may be, in relation to any shares of stock, securities or assets thereafter
    deliverable upon the conversion hereof. The Issuer shall not effect any 
    such

                                       4








          consolidation, merger or sale, unless prior to the consummation 
          thereof the successor corporation (if other than the Issuer) 
          resulting from such consolidation or merger or the corporation 
          purchasing such assets shall assume by written instrument executed 
          and mailed to the registered holder hereof at the last address of 
          such holder appearing on the books of the Issuer, the obligation to 
          deliver to such holder such shares of stock, securities or assets 
          into which, in accordance with the foregoing provisions, such 
          holder may be entitled to convert this Debenture.

               (iii) If the Issuer distributes to all holders of Common Stock 
          any assets (excluding ordinary cash dividends) or debt securities or 
          any rights or warrants to purchase debt securities, assets or other 
          securities (including Common Stock), the Conversion Price shall be 
          adjusted in accordance with the formula:

          C(1) = C x (O x M) - F
                 ---------------
                    O x M

where:

          C(1) = the adjusted Conversion Price.

          C    = the current Conversion Price.

          M    = the average market price of 
                 Common Stock for the 30
                 consecutive trading days
                 commencing 45 trading days before
                 the record date mentioned below.

          O    = the number of shares of Common
                 Stock outstanding on the record
                 date mentioned below.

          F    = the fair market value on the record
                 date of the aggregate of all assets,
                 securities, rights or warrants
                 distributed. The Issuer's Board of 
                 Directors shall determine the fair
                 market value in the exercise of its 
                 reasonable judgment.

     The adjustment shall be made successively whenever any such distribution 
is made and shall become effective immediately after the record date for the 
determination of stockholders entitled to receive the distribution.


                                      5



               (iv)  If the Issuer issues or sells any shares of Common Stock 
          for a consideration per share less than the Conversion Price then in 
          effect (other than dividends payable in shares of Common Stock), or 
          issues any options, warrants, or other rights to purchase Common 
          Stock at a consideration per share less than the Conversion Price 
          then in effect, or issues securities convertible into Common Stock 
          at a conversion price per share of less than the Conversion Price 
          then in effect, then the Conversion Price in effect immediately 
          prior to such issuance or sale shall be adjusted by multiplying 
          such Conversion Price by a fraction, (a) the numerator of which 
          shall be an amount equal to the sum of (A) the aggregate number of 
          shares of Common Stock outstanding immediately prior to such issuance
          or sale multiplied by the applicable Conversion Price in effect 
          immediately prior to such issuance or sale, and (B) the total 
          consideration payable to the Issuer upon such issuance or sale of 
          such Common Stock and/or such purchase rights or convertible 
          securities, plus the consideration payable to the Issuer upon the 
          exercise of such purchase rights or upon conversion of such 
          convertible securities, and (b) the denominator of which shall be 
          an amount equal to the aggregate number of shares of Common Stock 
          outstanding immediately after such issuance or sale plus the number 
          of shares of Common Stock issuable upon the exercise of any purchase
          rights and/or upon the conversion of convertible securities issued 
          in such issuance. If the Conversion Price is adjusted as the result 
          of the issuance of any options, warrants or other purchase rights or 
          upon the issuance of convertible securities, no further adjustments 
          of such Conversion Price shall be made at the time of the exercise 
          of such options, warrants or other purchase rights or convertible 
          securities. If securities are sold for a consideration other than 
          cash, the amount of the consideration other than cash received by 
          the Issuer shall be deemed to be the fair value of such 
          consideration as determined by the Board of Directors of the Issuer.

               (v)  Upon any adjustment of the Conversion Price, then and in 
          each such case, the Issuer shall give written notice thereof, by 
          first class mail, postage prepaid, addressed to the registered 
          holder of this Debenture at the address of such holder as shown on 
          the books of the Issuer, which notice shall state the Conversion 
          Price resulting from such adjustment and the increase or decrease, 
          if any, in the number of shares into which this Debenture may be 
          converted, setting forth in reasonable detail the method of 
          calculation and the facts upon which such calculation is based.

          (c)  The number of shares of Common Stock to be received upon 
     conversion of this Debenture shall be equal to (x) the principal amount 
     of this Debenture, divided by (y) the per share Conversion Price. 
     Conversion shall be effected by the Holder completing and duly executing 
     the conversion election form attached hereto (the "Conversion Election") 
     and surrendering this Debenture, together with such Conversion Election, 
     to the Issuer at its


                                      6



      principal office on or before the date for such conversion stated in 
      the Conversion Election or before the Redemption Date stated in the 
      Redemption Notice. This Debenture, or any part thereof called for 
      redemption, must be covered in whole and not in part.

           (d)  As soon as practicable after the receipt of the Conversion 
      Election, the Company will cause to be issued in the name of and 
      delivered to the Holder hereof, or as such Holder may direct, a 
      certificate or certificates representing the shares of Common Stock 
      acquired upon such exercise. No fractional shares of Common Stock 
      shall be issued; in lieu of any fractional shares to which the Holder 
      would otherwise be entitled, the Company shall pay cash equal to such 
      fraction multiplied by the then effective Conversion Price. The 
      Company shall also pay the Holder an amount equal to the interest 
      accrued on the Debenture to the date of conversion.

           (e)  Any shares of Common Stock issued upon conversion shall not 
      be freely tradeable and shall be "restricted shares," shall be subject 
      to the same restrictions on transfer as are the Debentures, and the 
      certificate therefor shall contain a legend in substantially the form 
      set forth on the face of this Debenture. In addition, all shares of 
      Common Stock so issued shall be entitled to certain registration 
      rights, as set forth herein and limited hereby.

           (f)  A number of shares of Common Stock sufficient to provide for 
      the exercise of the conversion rights upon the basis herein set forth 
      shall at all items be reserved for the exercise thereof, subject to 
      any required action of the shareholders. If any such shareholder 
      action is required, the Issuer shall use its best efforts to cause 
      such action to be taken.

     5.  SUBORDINATION.

     This Debenture is not, nor shall it ever be, secured by any collateral 
and is not, nor shall it ever be, the subject of any guaranty. The 
Subordinate Obligations are and shall be expressly subordinate and junior in 
right of payment to all Senior Secured Obligations until the Senior Secured 
Obligations have been Paid In Full. Holder's interest in and to the payment 
of principal, interest and premium or any other amounts due hereunder, is 
subordinate to the interest of the Senior Lender and subject to the terms of 
this Agreement. The Senior Lender has advanced funds and may from time to 
time advance additional funds in reliance upon the subordination of the 
Subordinate Obligations to the Senior Secured Obligations. Holder agrees to 
be fully unsecured with respect to the Subordinate Obligations and, to that 
end, Holder agrees to execute, file and/or record all such releases, 
termination statements and satisfactions as are requested by the Senior 
Lender in order to cause the Subordinate Obligations to be fully unsecured.

     6.  DEFAULT.

     Each of the following events shall be an Event of Default ("Event of 
Default") for purposes of this Debenture:


                                       7



      (a)  The Issuer fails to pay when due any installment of interest on 
this Debenture within fifteen (15) days of the due date.

      (b)  The Issuer fails to pay when due any principal or premium within 
30 days of the due date.

      (c)  The Issuer defaults in the due and punctual performance or 
observance of any material term contained in this Debenture, and such default 
continues for a period of sixty (60) days after written notice thereof to the 
Issuer; provided, however, that if such default cannot be cured within 60 
days, corrective action must be instituted within such period, and such 
default must be cured as promptly as practicable, but in any event within 120 
days.

      (d)  Any representation or warranty made by or on behalf of the Issuer 
in this Debenture or in any certificate or other instrument delivered under 
or pursuant to any term hereof shall prove to have been untrue or incorrect 
in any material respect as of the date such representation or warranty was 
made or if any certificate, financial statement or financial schedule or 
other instrument prepared by the Issuer or any executive officer of the 
Issuer furnished or delivered under or pursuant to this Debenture after the 
date hereof shall prove to be untrue or incorrect in any material respect as 
of the date it was made, furnished or delivered.

      (e) The Issuer shall fail to deliver the appropriate number of shares of 
Common Stock in satisfaction of a Conversion Election by a Holder as provided 
herein and such default shall continue for a period of ten (10) days after 
written notice of such default to the Issuer.

      (f)  The Issuer or any subsidiary shall default in any material respect 
in the due and punctual performance of any covenant or agreement in any note, 
bond, indenture, loan agreement, note agreement, mortgaged security agreement 
or other instrument evidencing indebtedness for borrowed money, excluding the 
Senior Loan Documents, in the principal amount of at least $250,000, and such 
default shall continue uncured or unwaived for more than 60 days after 
written notice to the Issuer thereof; the parties hereto agreeing that an 
event of default under the Senior Loan Documents shall not constitute an 
Event of Default hereunder.

      (g)  The Issuer makes an assignment for the benefit of creditors, or 
admits in writing its inability to pay its debts as they become due, or files 
a voluntary petition in bankruptcy, or is adjudicated as bankrupt or 
insolvent, or files any petition or answer seeking for itself a 
reorganization arrangement composition readjustment, liquidation, dissolution 
or similar relief under any present or future statute, law or regulation, or 
files any answer admitting the material allegations of a petition filed 
against the Issuer for any such relief, or a petition is filed against the 
Issuer and the petition is not dismissed within 60 days after the filing 
thereof, or if a trustee, receiver or similar officer is appointed for the 
Issuer for the


                                       8


     Issuer's property and such appointment is not dismissed within 60 days 
     after such appointment.

     Upon the occurrence of an Event of Default, then not fewer than three 
Holders holding not less than an aggregate of twenty-five percent (25%) of 
the principal amount of the Debentures then outstanding may declare 
immediately due and payable the outstanding amounts under all the Debentures, 
and the same shall thereupon be immediately due and payable, and, subject to 
the terms contained in Sections 7 and 8 hereof, may exercise any and all 
remedies available under Illinois law or in equity.

     Upon the occurrence of an Event of Default as described in Section 6(e) 
hereof, the Holder hereof shall have the option to declare the principal 
amount hereof, and all accrued but unpaid interest thereon, to be immediately 
due and payable upon written notice from the Holder to the Issuer and, 
subject to the terms contained in Sections 7 and 8 hereof, to exercise any 
and all remedies available to it under Illinois law or at equity.

     7. STANDBY; NON-INTERFERENCE.

          (a) At any time prior to the date the Senior Secured Obligations 
      are Paid in Full, Holder shall not, except as expressly provided in 
      Sections 7(d) and 7(f) hereof or with respect to the Issuer's 
      obligations in Sections 4 and 14 hereof, (i) exercise any rights or 
      remedies Holder may have under the Subordinate Convertible Debentures 
      or otherwise; (ii) commence or join with any other creditors of Issuer 
      (except the Senior Lender) in commencing any bankruptcy, 
      reorganization, receivership or insolvency proceeding against Issuer; 
      (iii) commence any action or proceeding against Issuer to enforce or 
      collect any Subordinate Obligation; (iv) commence any action to obtain 
      possession of property of Issuer, to exercise control over property of 
      Issuer or to create, perfect or enforce any lien against property of 
      Issuer; (v) exercise any control over or power to direct the use or 
      distribution of insurance proceeds, condemnation proceeds, proceeds of 
      sale of any property of Issuer; or (vi) take any action which 
      interferes with or impairs Senior Lender's rights and remedies, in any 
      manner whatsoever.

          (b) In the event Issuer defaults on its obligations to Senior 
      Lender and, as a result, Senior Lender undertakes to enforce Senior 
      Lender's security interests and liens in Issuer's assets, Holder agrees 
      that Holder will not hinder, delay or otherwise prevent Senior Lender 
      from taking any and all action which Senior Lender deems necessary to 
      enforce Senior Lender's security interests and liens in Issuer's assets 
      and to realize thereon or to take any action which interferes with or 
      impairs Senior Lender's rights and remedies, in any manner whatsoever.

          (c) If any insolvency, bankruptcy, receivership, liquidation, 
      reorganization or other similar proceedings are commenced by or against 
      Issuer or its property, or if any proceedings for involuntary 
      liquidation, dissolution or other winding up of Issuer whether or not 
      involving insolvency or bankruptcy are commenced by or against Issuer, 
      then

                                       9



      Senior Lender shall be entitled in any such proceeding to receive 
      Payment in Full of all Senior Secured Obligations before Holder is 
      entitled in any such proceedings to receive any payment on account of 
      the Subordinate Obligations, and to that end, in any such proceedings, 
      any payment or distribution of any kind or character, (whether in cash, 
      cash equivalents, property (excluding the Issuer's Common Stock), by 
      set-off or otherwise) to which Holder would be entitled but for the 
      provisions hereof, shall be delivered to Senior Lender to the extent 
      necessary to make Payment in Full of all Senior Secured Obligations 
      remaining unpaid, after giving effect to any concurrent payment or 
      distribution to or for Senior Lender in respect thereof.

          (d) At any time prior to the date the Senior Secured Obligations 
      are Paid in Full, upon the occurrence of an Event of Default under the 
      terms of the Subordinate Convertible Debentures, Holder may subject to 
      the limitations on remedies contained in Section 6, on a date not 
      earlier than two hundred seventy (270) days from the date an Event of 
      Default occurs hereunder, (i) accelerate payments due pursuant to the 
      Subordinate Convertible Debentures; (ii) demand payment from Issuer; 
      (iii) bring suit against Issuer; and (iv) obtain a judgement against 
      Issuer. Until the Senior Secured Obligations are Paid in Full, Holder 
      may not record, register, or file such judgement or take any further 
      actions to enforce its judgement against the assets of Issuer or do any 
      of the other acts or exercise any other of the rights described in 
      Section 7(a); provided, however, that this Section 7(d) shall not limit 
      or impair Holder's rights to enforce the provisions of Sections 4 and 
      14 hereof.

          (e) Holder shall have no right to receive any payments or monies 
      resulting from such action or proceeding until the Senior Secured 
      Obligations are Paid in Full and Holder shall not take any action which 
      interferes with or impairs Senior Lender's rights and remedies, in any 
      manner whatsoever.

          (f) Subject to the provisions of Section 7(e), Holder may, in any 
      proceeding described in Section 7(c) hereof, in the name of Holder, 
      file claims, proofs of claims and other instruments of similar 
      character necessary to enforce the obligations of Issuer in respect of 
      the Subordinate Obligations. Neither this Section 7(f) nor any other 
      provision hereof shall be construed to give Holder any right to vote 
      any Issuer Obligation held by Senior Lender, any related claim or any 
      portion of such claim, whether in connection with any resolution, 
      arrangement, plan or reorganization, compromise, settlement, election 
      of trustees or otherwise.

          (g) Nothing in this Agreement shall restrict the ability of the 
      Senior Lender to declare a default, accelerate all or any portion of 
      the Senior Secured Obligations and/or exercise any and all rights and 
      remedies contained in the Senior Loan Documents.

                                   10



8.  PERMITTED PAYMENTS; RIGHT TO RETAIN PAYMENTS.

    (a)  Holder shall not be entitled to receive or retain any direct or 
indirect payment (in cash, cash equivalents, property (excluding the Issuer's 
Common Stock), by set-off or otherwise) from Issuer of or on account of any 
Subordinate Obligations: (i) if the payment from Issuer to Holder would 
create a Default or an Event of Default under the terms of the Senior Loan 
Documents, or (ii) if there has occurred and is continuing an Event of 
Default under the terms of the Senior Loan Documents. Provided that no Event 
of Default or Default (as defined in the Senior Loan Agreement) shall have 
occurred and is continuing under the terms of the Senior Loan Agreement, 
Issuer shall be entitled to make to, and Holder shall be entitled to receive 
and retain (i) semi-annual installments of interest at the interest rate set 
forth in the Subordinated Loan Documents, commencing on July 1, 1997 and 
thereafter until Paid in Full and (ii) the redemption payments pursuant to 
Section 3(c) hereof. Nothing herein shall limit or impair Holder's rights to 
enforce the provisions of Sections 4 and 14 hereof.

    (b)  Except as expressly provided in Section 8(a), at any time that any 
Senior Secured Obligation is outstanding, Issuer shall not make and Holder 
shall not receive or accept any payment (in cash, cash-equivalents, property, 
by set-off or otherwise) of any kind or nature with respect to the 
Subordinate Obligations, including but not limited to any prepayment of 
principal or interest.

    (c)  If Issuer shall make any payments which the Holder is not permitted 
to receive and retain pursuant to this Agreement, then such payment shall be 
held in trust by Holder for the benefit of, and shall be paid over promptly 
to the Senior Lender, for application to the payment of the Senior Secured 
Obligations, in such order of priority as Senior Lender shall determine, in 
its sole and exclusive discretion. If Holder pays over any payment or 
distribution as provided above, then such payment or distribution shall be 
deemed to have been made by Issuer directly to Senior Lender and not to 
Holder and no Subordinate Obligation shall be discharged by reason of its 
receipt of any payment or distribution which is so paid over to Senior Lender.

9.  COVENANTS.

    (a)  The Issuer agrees that until this Debenture is paid in full, the 
Issuer will:

         (1)  Do or cause to be done all things necessary to preserve and 
    keep in full force and effect its corporate existence, rights (charter 
    and statutory) and franchises and those of its subsidiaries.

         (2)  Deliver to the Holder hereof:

              (i) as soon as practicable, but in any event within 45 days 
         after the close of each of the Issuer's first three fiscal quarters, 
         unaudited summary

                                               11



         consolidated operating results, balance sheets and cash flow 
         statements and cash flow statements of the Company and its subsidiaries
         as of the end of such fiscal quarter, and in comparative form figures 
         for the corresponding fiscal quarter of the previous fiscal year, all 
         in reasonable detail, and certified by an authorized accounting officer
         of the Company, subject to year-end adjustments;

              (ii)  as soon as practicable, but in any event within 90 days 
         after the end of each fiscal year, a consolidated balance sheet of 
         the Issuer and its subsidiaries, as of the end of such fiscal year, 
         together with the related consolidated statements of operations, 
         shareholders' equity and cash flow for such fiscal year, setting 
         forth in comparative form figures for the previous fiscal year, all 
         in reasonable detail, and duly certified by the Issuer's independent 
         public accountants;

              (iii) concurrently with the delivery of the financial 
         statements referred to in paragraphs (i) and (ii) above, a 
         certificate of the Issuer signed by the President or Chief Financial 
         Officer, stating that, to the best of such officer's knowledge after 
         due inquiry, the Issuer has performed and observed each and every 
         covenant contained in this Debenture to be performed by it and that 
         no event has occurred and no condition then exists which constitutes 
         an Event of Default or would constitute each an Event of Default 
         upon the lapse of time or upon the giving of notice and the lapse of 
         time; or, if any such event has occurred or any such condition 
         exists, specifying the nature thereof; and

              (iv)  provided that, if the Issuer is subject to the reporting 
         requirements of the Securities Exchange Act of 1934, as amended (the 
         "Exchange Act"), delivery to the Holder of annual and quarterly 
         reports, proxy statements and registration statements filed with the 
         Securities and Exchange Commission as and when delivered to the 
         public security holders of the Issuer shall be sufficient to satisfy 
         the Issuer's obligations under this Section 9(a)(2).

         (3)  Pay, and cause each subsidiary to pay, all taxes, assessments 
    and other governmental charges imposed upon it or any of its properties 
    or assets, except where the failure to so pay such taxes would not have a 
    material adverse effect on the business or financial condition of the 
    Issuer and its subsidiaries, taken as a whole, or where the Issuer is in 
    good faith contesting the imposition of a tax or the amount due 
    thereunder.

         (4)  Conduct, and cause its subsidiaries to conduct, their 
    respective businesses in substantial compliance with all laws and 
    regulations governing the operation of such businesses, except where the 
    failure to so conduct such businesses

                                        12

      




          would not have a material adverse effect on the business or 
          financial condition of the Issuer and its subsidiaries, taken as a 
          whole.

              (5)  Maintain, and cause its subsidiaries to maintain, their 
          respective properties and assets in generally good repair, working 
          order and condition and maintain, with financially sound and reputable
          insurers, insurance with respect to such properties and assets 
          against such losses, hazards, liabilities and risks, and in 
          amounts, to the extent and in the manner customary for companies in 
          similar businesses similarly situated, except where the failure to 
          so maintain properties and assets or to so maintain insurance would
          not have a material adverse effect on the business or financial
          condition of the Issuer and its subsidiaries, taken as a whole.

          (b)  The Issuer agrees that until this Debenture is paid in full, 
     the Issuer will not declare or pay any dividend or make any other 
     distribution on (i) the Common Stock or (ii) any class of preferred 
     stock, unless (x) such dividend or distribution is permitted under the 
     terms of the Senior Loan Documents AND (y) there is no Event of Default 
     existing AND (z) the shareholders' equity of the Issuer, determined on a 
     consistent basis in accordance with GAAP, after payment of the dividend, 
     shall not be less than $20,812,000.

     10.  MODIFICATION OF DOCUMENTS

          (a)  Senior Lender may amend, modify, extend, restate, replace or 
     otherwise alter any Senior Loan Document in any manner whatsoever, 
     without notice to or consent of Holder, including, but not limited to 
     granting additional financial accommodations to Issuer, extending the 
     term thereof, modifying the payment terms, increasing the principal 
     amount of the loans, and interest rate thereof, and events of default. 
     Any such amendment, modification, supplement, restatement or replacement 
     shall not affect or impair the obligations of Holder and the Subordinate 
     Obligations shall be subordinated to the Senior Secured Obligations as 
     evidenced by the Senior Loan Documents, as amended, modified, 
     supplemented, restated or replaced. Senior Lender shall have the right 
     to exercise any and all rights and remedies granted to Senior Lender 
     pursuant to the Senior Loan Documents, without notice to or consent of 
     Holder.

          (b)  At any time prior to the time the Senior Secured Obligations 
     are Paid in Full, neither the Holder nor the Issuer shall, without the 
     prior written consent of the Senior Lender, which consent may be 
     withheld in Senior Lender's sole and absolute discretion, (i) amend, 
     modify or otherwise alter the Subordinated Convertible Debentures in any 
     manner whatsoever, including but not limited to modifications of the 
     interest rate, payment terms, time for payments, or events of default, 
     (ii) accept, retain, request or take any collateral for the Subordinated 
     Obligations, (iii) increase the Subordinated Debt, or (v) except as 
     expressly permitted pursuant to Section 8(a), accept payment of, demand 
     payment of, sue for or receive all or any part of the Subordinated Debt.

                                     13



     11.  REVIVAL OF SUBORDINATION.  Notwithstanding the Payment in Full of 
any Issuer Obligation, if any payment on account of any Issuer Obligation or 
any proceeds of collateral thereunder which are received by Senior Lender or 
Holder are subsequently rescinded or otherwise required to be repaid to 
issuer or any other person for any reason, then, to the extent such 
payment(s) and/or proceeds are repaid to Issuer or such other person, the 
subordination effected hereby with respect to such Issuer Obligation shall be 
revived and continued in full force and effect as if such payment(s) and/or 
proceeds had not been received by the original recipient thereof.

     12.  MISCELLANEOUS PROVISIONS.

     The Issuer will not, by amendment of its Articles of Incorporation or 
through reorganization consolidation, merger, dissolution or sale of assets, 
or by any other voluntary act or deed, avoid or seek to avoid the observance 
or performance of any of the covenants, stipulations or conditions to be 
observed or performed hereunder by the Issuer, but will, at all times in good 
faith, assist, insofar as it is able, in the carrying out of all provisions 
hereof.

     This Debenture is issued in fully registered form without interest 
coupons. Transfer of this Debenture is restricted. The Issuer shall be 
entitled to treat the person or entity listed as the registered owner on its 
Debenture Register as the owner of this Debenture for all purposes.

     Upon receipt of evidence satisfactory to the Issuer of the loss, theft, 
destruction or mutilation of this Debenture and in the case of any such loss, 
theft or destruction, upon delivery of a bond of indemnity satisfactory to the 
Issuer if requested by the Issuer, or in the case of any such mutilation, 
upon surrender and cancellation of such Debenture, the Issuer shall issue a 
new Debenture identical in form to the lost, stolen, destroyed or mutilated 
Debenture.

     13.  NOTICES: ETC.

          (a)  Any notice to a holder shall be in writing addressed to the 
     Holder at the address last shown on the Issuer's Debenture register, shall
     be deemed given when delivered in person or three (3) days after deposit in
     the United States mail, postage prepaid and addressed in accordance with 
     this section. Any notice to the Issuer shall be deemed given when delivered
     in person or three (3) days after deposit in the United States mail, 
     postage prepaid and addressed as follows:

          If to Issuer:      TRO Learning, Inc.
                             1721 Moon Lake Boulevard
                             Suite 555
                             Hoffman Estates, IL 60194
                             Attn: Chief Financial Officer

     A party may change its address by notice given in conformity with this 
section.

                                     14



         (b)  This Debenture shall be governed and interpreted under the laws 
     of the State of Illinois, without regard to the conflicts of laws 
     provision thereof.

         (c)  Whenever reference is made herein to the issue or sale of 
     shares of Common Stock, the term "Common Stock" shall include any stock 
     of any class of the Company other than preferred stock with a fixed 
     limit on dividends and a fixed amount payable in the event of any 
     voluntary or involuntary liquidation, dissolution or winding up of the 
     Company.

         (d)  All shares of Common Stock or other securities issued upon the 
     exercise of the Conversion Right shall be validly issued, fully paid and 
     non-assessable, and the Company will pay all taxes in respect of the 
     issuance thereof, if any.

         (e)  Notwithstanding anything contained herein to the contrary, the 
     Holder of this Debenture shall not be deemed a shareholder of the 
     Company for any purpose whatsoever until and unless this Debenture has 
     been converted pursuant to Section 3 hereof.

    14.  REGISTRATION RIGHTS.

    The Holder acknowledges and understands that the shares of Common 
Stock to be issued hereunder are not required to be registered under any 
securities laws except as set forth below. If such shares are not so 
registered, they will be "restricted securities" as that term is used 
under the Securities Act of 1933, as amended (the "Securities Act"), and 
the transferability and liquidity will be substantially restricted by 
federal and state securities laws and will bear a legend comparable to 
that set forth on the first page hereof.

         (a)  On or before the nine-month anniversary of the date hereof, 
     the Company shall file a registration statement under the Securities Act 
     covering the sale of the Shares of Common Stock issuable upon conversion 
     of the Debentures. The Company shall use its best efforts to have such 
     registration statement declared effective by the Securities and Exchange 
     Commission (the "Commission") by the twelve-month anniversary of the 
     date hereof. The costs and expenses directly related to such 
     registration, including but not limited to legal fees of the Company's 
     counsel, audit fees, printing expense, filing fees and fees and expenses 
     relating to qualifications under state securities or blue sky laws 
     incurred by the Company shall be borne entirely by the Company; 
     provided, however, that the persons for whose account the securities 
     covered by such registration are sold shall bear the underwriting 
     commissions, if any, applicable to their shares and fees of their legal 
     counsel. If the holders of shares of Common Stock underlying the 
     Debentures are the only persons whose shares are included in the 
     registration pursuant to this section, such holders shall bear the 
     expense of inclusion of audited financial statements in the registration 
     statement which are not dated as of the Company's normal fiscal year or 
     are not otherwise prepared by the Company for its own business purposes. 
     The Company shall keep effective and maintain such registration 
     statement for such period as may be necessary for the holders of such 
     common stock to dispose of such securities and, from time to time shall 
     amend or supplement, at the holder's expense, the prospectus or offering 
     circular used in connection

                                     15



     therewith to the extent necessary in order to comply with applicable 
     law; provided, that the Company shall not be required to maintain the 
     effectiveness of such registration statement once holders of the 
     Debentures can sell the shares underlying the Debentures under Rule 
     144(k) or any successor thereto under the Securities Act.

         (b)  The managing underwriter of an offering registered pursuant to 
     Section 14(a), if any, shall be selected by the holders of a majority of 
     the shares issued or issuable upon the conversion of the Debentures for 
     which registration has been requested and shall be reasonably acceptable 
     to the Company. Without the written consent of the holders of a majority 
     of the shares issued or issuable upon the exercise of the Debentures for 
     which registration has been requested pursuant to this Section 14(b), 
     neither the Company nor any other holder of securities of the Company 
     may include securities in such registration if in the good faith 
     judgment of the managing underwriter of such public offering the 
     inclusion of such securities would interfere with the successful 
     marketing of the share issued upon the conversion of the Debentures or 
     require the exclusion of any portion of the shares issued upon the 
     exercise of the Debentures to be registered.

         (c)  If the Company proposes to claim an exemption under Section 
     3(b) of the Securities Act for a public offering of any of its 
     securities or to register under the Securities Act (except by a claim of 
     exemption or registration statement on a form that does not permit the 
     inclusion of shares by its security holders) any of its securities, it 
     will give written notice to all registered holders of the Debentures, 
     and all registered holders of shares of Common Stock acquired upon the 
     conversion of Debentures, of its intention to do so and, on the written 
     request of any such registered holders given within twenty (20) days 
     after receipt of any such notice (which request must be made within 
     seven (7) years from the date of this Debenture), the Company will use 
     its best efforts to cause all such shares, the registered holders of 
     which shall have requested the registration or qualification thereof, to 
     be included in such notification or registration statement proposed to 
     be filed by the Company; provided, however, that (i) the Company shall 
     not be required to include any such shares of Common Stock in any such 
     registration for any holder who is able to sell all shares of Common 
     Stock owned by such holder (or issuable to such holder upon conversion 
     of this Debenture), and which benefit from the registration rights 
     granted hereunder, during the three-month period beginning on the date 
     such notice is received by such holder, without compliance with the 
     registration requirements of the Securities Act pursuant to Rule 144(k) 
     or any successor thereto under the Securities Act; (ii) the Company 
     shall not be required to give such notice with respect to, or to include 
     such Common Stock in, any such registration which is primarily (A) a 
     registration of a stock option plan or other employee benefit plan or of 
     securities issued or issuable pursuant to any such plan such as a 
     registration on Form S-8, or (B) a registration of securities proposed 
     to be issued in exchange for securities or assets of, or in connection 
     with a merger or consolidation with, another corporation such as a 
     registration on Form S-4; (iii) the Company shall not be required to 
     include in any such registration any shares of Common Stock previously 
     duly registered under the Securities Act; (iv) the Company may, in its 
     sole discretion, withdraw any such registration statement and abandon 
     the proposed offering in which any such holder had requested to 
     participate;

                                     16




(v) if the offering to which the registration statement relates is to be 
distributed by or through an underwriter, each such holder shall agree, as a 
condition to the inclusion of such holder's securities in such registration, 
to sell the securities held by such holder through such underwriter on the 
same terms and conditions as the underwriter agrees to sell securities on 
behalf of the Company and not to sell, transfer, pledge, assign or otherwise 
dispose of any shares of Common Stock not sold by such holder in such 
offering for such period (up to (90) days after the effective date of the 
registration statement) as may be required by the underwriter; and (vi) if 
the offering to which the registration statement relates is to be distributed 
by or through an underwriter and a greater number of securities is offered 
for participation in the proposed underwriting than, in the opinion of the 
Company's underwriter, can be accommodated without significantly adversely 
affecting the proposed underwriting, the amount of such securities otherwise 
to be included in the underwritten offering on behalf of all persons other 
than the Company may be reduced pro rata, in accordance with the number of 
shares of Common Stock proposed to be sold by each such holder, or may be 
eliminated entirely from such underwritten public offering. The costs and 
expenses of such offering, including but not limited to legal fees, special 
audit fees, printing expenses, filing fees, fees and expenses relating to 
qualifications under state securities or blue sky laws and the premiums for 
insurance, if any, incurred by the Company in connection with any 
registration made pursuant to this Section 14(c) shall be borne entirely by 
the Company; PROVIDED, HOWEVER, that any holders participating in such 
registration shall bear their own underwriting discounts and commissions and 
the fees and expenses of their own counsel or accountants in connection with 
any such registration.

    (d)  In connection with the filing of a registration statement under 
Sections 14(a) and (c) hereof, the Company shall:

         (i)    prepare and file with the U.S. Securities and Exchange 
    Commission (the "Commission") such amendments to such registration 
    statement and supplements to the prospectus contained therein as may 
    be necessary to keep such registration statement effective until holders 
    of the Debentures can sell the shares underlying the Debentures without 
    restriction under Rule 144(k) or any successor thereto under the 
    Securities Act;

         (ii)   furnish to the security holders participating in such 
    registration and to the underwriters of the securities being registered 
    such reasonable number of copies of the registration statement, preliminary
    prospectus, final prospectus and such other documents as such underwriters 
    may reasonably request in order to facilitate the public offering of such 
    securities;

         (iii)  use its best efforts to register or qualify the securities 
    covered by such registration statement under such state securities or blue 
    sky laws of such jurisdictions as such participating holders may reasonably 
    request in writing within thirty (30) days following the original filing of 
    such registration statement, except that the Company shall not for any 
    purpose be required to execute a general consent

                                      17



    to service of process or to qualify to do business as a foreign 
    corporation in any jurisdiction wherein it is not so qualified;

         (iv)   notify the security holders participating in such 
    registration, promptly after it shall receive notice thereof, of the time 
    when such registration statement has become effective or a supplement to any
    prospectus forming a part of such registration statement has been filed;

         (v)    notify such holders promptly of any request by the Commission 
    for the amending or supplementing of such registration statement or 
    prospectus or for additional information;

         (vi)   prepare and file with the Commission, promptly upon the 
    request of any such holders, any amendments or supplements to such 
    registration statement or prospectus which, in the opinion of counsel for
    such holders (and concurred in by counsel for the Company), is required 
    under the Securities Act or the rules and regulations thereunder in 
    connection with the distribution of the shares by such holder;

         (vii)  prepare and promptly file with the Commission and promptly 
    notify such holders of the filing of such amendment or supplement to 
    such registration statement or prospectus as may be necessary to 
    correct any statements or omissions if, at the time when a prospectus 
    relating to such securities is required to be delivered under the 
    Securities Act, any event shall have occurred as the result of which 
    any such prospectus or any other prospectus as then in effect would 
    include an untrue statement of a material fact or omit to state any 
    material fact necessary to make the statements therein, in the light 
    of the circumstances in which they were made, not misleading;

         (viii) advise such holders, promptly after it shall receive notice 
    or obtain knowledge thereof, of the issuance of any stop order by the 
    Commission suspending the effectiveness of such registration statement or 
    the initiation or threatening of any proceeding for that purpose and 
    promptly use its best efforts to prevent the issuance of any stop order or 
    to obtain its withdrawal if such stop order should be issued;

         (ix)   not file any amendment or supplement to such registration 
    statement or prospectus to which a majority in interest of such holders 
    shall have reasonably objected on the grounds that such amendment or 
    supplement does not comply in all material respects with the requirements 
    of the Securities Act or the rules and regulations thereunder, after having 
    been furnished with a copy thereof at least five (5) business days prior to 
    the filing thereof, unless in the opinion of counsel for the Company the 
    filing of such amendment or supplement is reasonably necessary to protect 
    the Company from any liabilities under any applicable federal or state law 
    and such filing will not violate applicable law; and

                                      18




               (x)  at the request of any such holder, furnish on the 
          effective date of the registration statement and, if such registration
          includes an underwritten public offering, at the closing provided for 
          in the underwriting agreement: (i) opinions, dated such respective 
          dates, of the counsel representing the Company for the purposes of 
          such registration, addressed to the underwriters, if any, and to 
          the holder or holders making such request, covering such matters as 
          such underwriters and holder or holders may reasonably request; and 
          (ii) letters, dated such respective dates, from the independent 
          certified public accountants of the Company, addressed to the 
          underwriters, if any, and to the holder or holders making such 
          request, covering such matters as such underwriters and holder or 
          holders may reasonably request, in which letter such accountants 
          shall state (without limiting the generality of the foregoing) that 
          they are independent certified public accountants within the meaning 
          of the Securities Act and that in the opinion of such accountants 
          the financial statements and other financial data of the Company 
          included in the registration statement or the prospectus or any 
          amendment or supplement thereto comply in all material respects with 
          the applicable accounting requirements of the Securities Act.

          (e)  The Company hereby indemnifies the holder of this Debenture and
     of any common stock issued or issuable hereunder, its officers and 
     directors, and any person who controls such Debenture holder or such 
     holder of common stock within the meaning of Section 15 of the Securities 
     Act, against all losses, claims, damages and liabilities caused by any 
     untrue statement of a material fact contained in any registration 
     statement, prospectus, notification or offering circular (and as amended 
     or supplemented if the Company shall have furnished any amendments or 
     supplements thereto) or any preliminary prospectus or caused by any 
     omission to state therein a material fact required to be stated therein 
     or necessary to make the statements therein not misleading except insofar 
     as such losses, claims, damages or liabilities are caused by any untrue 
     statement or omission contained in information furnished in writing to the
     Company by such holder or such holder of Common Stock expressly for use 
     therein, and each such holder by its acceptance hereof severally agrees 
     that it will indemnify and hold harmless the Company and each of its 
     officers who signs such registration statement and each of its directors 
     and each person, if any, who controls the Company within the meaning of 
     Section 15 of the Securities Act with respect to losses, claims, damages 
     or liabilities which are caused by any untrue statement or omission 
     contained in information furnished in writing to the Company by such 
     holder expressly for use therein.



                                            TRO LEARNING, INC.


                                            By
                                              --------------------------------
                                              Its Chief Financial Officer


                                      19



                              TRO LEARNING, INC.
             SERIES 1997 10% SUBORDINATED CONVERTIBLE DEBENTURES
               DUE          , 2004, CONVERSION ELECTION NOTICE
                   ---------
                               **************


     The original Debenture and this completed Conversion Election Notice 
shall be delivered to the Issuer.

     The undersigned hereby elects to exercise the conversion right contained 
in the attached Debenture and to purchase

$               in shares of Common Stock of the Issuer at the applicable per 
 --------------
share Conversion Price, to be determined as defined in the Debenture.



Dated:
      ---------, ----          ----------------------------------------------
                               Notice: The signature must correspond with the
                               name(s) as it appears on this Debenture in every
                               particular without any change whatsoever.


(Address)
         ------------------------------------------------------------

         ------------------------------------------------------------

(Tax identification number
or Social Security Number)
                          -------------------------------------------

Signature Guaranty:
                   --------------------------------------------------


                                      20