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                                                                    Exhibit 10.6


                        LENDER AGREEMENT FOR GUARANTEE OF
                     STUDENT LOANS WITH FEDERAL REINSURANCE
                            (SECONDARY MARKET LENDER)


         For loans eligible for guarantee under the Higher Education Act of
1965, as amended (the "Act").

         WHEREAS, The First National Bank of Chicago, not in its individual
capacity but solely as Eligible Lender Trustee on behalf of the KeyCorp Student
Loan Trust 1999-A (the "Trust"), pursuant to the Trust Agreement dated as of
July 13, 1998, between Key Bank USA, National Association and the Eligible
Lender Trustee, as the same may be amended, including by way of amendment and
restatement, from time to time (the "Trust Agreement") located at, One First
National Plaza, Suite 0126, Chicago, Illinois 60670, Attn: Corporate Trust
Administration, using DE Lender ID number 833220 (the "Lender") wishes to secure
loan guarantees with the Nebraska Student Loan Program, Inc. ("NSLP") on federal
student loans made to "Eligible Borrowers" (as hereinafter defined) purchased by
Lender from eligible institutions pursuant to the Act; and

         WHEREAS, Lender represents that it is an eligible secondary market
lender under the provisions of the Act and the "Program Rules" (as hereinafter
defined).

         NOW, THEREFORE, it is mutually agreed that:

    1.        The following words and terms shall have the following meanings
              unless otherwise herein provided or unless the context or use
              clearly indicates another or differing meaning or intent:

              (a)    "Act" shall mean Title IV, Part B, of the Higher Education
                     Act of 1965, as amended, the regulations promulgated
                     thereunder, and all official interpretations of federal
                     requirements as issued by the U.S. Department of Education
                     ("ED");

              (b)    "Agreement" shall mean this Agreement;

              (c)    "Eligible Borrower" shall mean a borrower as defined by the
                     Act;

              (d)    "Eligible Loan" shall mean a loan as defined by the Act;
                     and

              (e)    "Program Rules" shall include, but are not limited to, the
                     Act, the Common Manual -Unified Student Loan Policy, NSLP
                     Operations Alerts and NSLP correspondent materials. All
                     such Program Rules, as amended from time to time, are
                     specifically incorporated into and made a part of this
                     Agreement.

    2.        NSLP shall guarantee Eligible Loans held by the Lender which have
              been acquired in conformance with the Program Rules. While the
              Trust is in existence, Lender shall purchase Eligible Loans in an
              amount not to exceed $1 billion In conjunction with the 



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               purchase of Eligible Loans, NSLP shall provide guarantee and
               related services to Lender in conformance with the Act and the
               Program Rules. NSLP shall review the principal amount of Eligible
               Loans on a quarterly basis to determine compliance with respect
               to this provision.

    3.         NSLP and the Lender agree that upon the default of a promissory
               note and the filing of a claim on such promissory note by the
               Lender, such claim shall be processed as provided for in the
               Program Rules.

    4.         NSLP agrees to maintain reserves as defined by the Act for the
               payment of claims/purchase of loans pursuant to the reinsurance
               contracts with the Secretary of Education.

    5.         Lender shall only purchase Eligible Loans made by qualified
               lenders to Eligible Borrowers permitted by the Program Rules.

    6.         The Lender, or its servicers, shall determine that each Eligible
               Loan obligation is a legal, valid and binding obligation of the
               Eligible Borrower, and shall engage in the requisite due
               diligence relative to the purchase, servicing, and collection of
               Eligible Loans as required by the Program Rules. Lender, or its
               servicers, shall document in the loan file the basis on which it
               made its determination and due diligence and retain the same for
               the term required by the Program Rules. Lender acknowledges that
               NSLP has no responsibility to review determinations or due
               diligence activity of Lender.

    7.         Lender shall notify NSLP in writing if any servicing or
               management of the Lender's Eligible Loans guaranteed by NSLP is
               done by an entity other than Lender or by a servicer other than
               Pennsylvania Higher Education Assistance Agency ("PHEAA") or EFS
               Services, Inc.("EFS"), Lender's current servicers. Lender shall
               provide NSLP with a copy of the current servicing agreement and
               otherwise perform pursuant to the terms of the Program Rules as
               they pertain to the use of a third party servicing entity.

    8.         Each Eligible Loan purchased by Lender has been made at an
               interest rate not otherwise prohibited by the Act.

    9.         Each Eligible Loan shall be subject to repayment on the terms 
               stated in the Act.

   10.         The Lender agrees to remit to NSLP any applicable fees permitted
               by the Act and the Program Rules or as otherwise required by
               NSLP.

   11.         NSLP and the Lender agree that the guarantee on any particular
               Eligible Loan shall be effective for the term of that Eligible
               Loan on the effective date determined in accordance with the
               Program Rules.





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   12.         In purchasing and servicing Eligible Loans from Eligible
               Borrowers, the Lender agrees to comply with all applicable
               federal and state laws in addition to (and not in conflict with)
               the Program Rules.

   13.         In the event the Lender, its servicing agent, any prior
               transferor, transferees or subsequent servicing agent shall
               violate or fail to comply with the Program Rules with respect to
               any Eligible Loan, Lender shall assume liability for and agrees
               to indemnify and keep harmless NSLP, its successors, assigns,
               directors, officers and agents from and against any and all
               liabilities, losses, damages, penalties, claims, actions,
               expenses and disbursements, including legal fees and expenses,
               imposed on, incurred by or asserted against them or any of them,
               in any way relating to or arising out of such violation or
               failure to comply with the Program Rules, irrespective of whether
               NSLP shall have purchased such Eligible Loans from the Lender.

   14.         The Lender, or its servicers, shall maintain for all Eligible
               Loans guaranteed a system of records and accounts, shall afford
               access thereto, and shall furnish such periodic and separate
               reports as may reasonably be required by the ED and NSLP under
               the Program Rules. For Eligible Loans paid in full or otherwise
               discharged, the records shall be retained by the Lender, or its
               servicers, as required by the Program Rules.

   15.         NSLP shall guarantee Eligible Loans without regard to sex, age,
               race, color, religion, handicapped status, income, national
               origin, or any other basis prohibited by applicable law. The
               Lender will not discriminate in the acquisition of Eligible Loans
               from originating lenders or in the treatment of Eligible
               Borrowers on any prohibited basis.

   16.         This Agreement shall inure to the benefit of and be
               binding upon NSLP, the Lender and their respective successors.
               The rights of Lender hereunder may be assigned in whole or in
               part by Lender to any permitted successor or to any purchaser of
               all or any part of its interest in the loans covered by this
               Agreement without NSLP's approval; provided, however: (i) that
               NSLP shall be given advance notice of such assignment and (ii)
               that Lender's obligations hereunder shall be assumed by any such
               successor or purchaser in writing. NSLP acknowledges that Lender
               will pledge the loans covered by this Agreement and all its
               rights hereunder to Bankers Trust Company, not in its individual
               capacity but solely as Indenture Trustee ("Indenture Trustee"),
               and agrees that in the event Indenture Trustee forecloses upon
               such collateral, Indenture Trustee may exercise any or all of
               Lender's rights hereunder.

   17.         Subject to the prior written approval of the Lender, which
               approval shall not be unreasonably withheld, NSLP may transfer
               Eligible Loans which are guaranteed to any other guarantor which
               has given NSLP its prior written approval of such transfer.
               Lender may likewise transfer Eligible Loans to another
               NSLP-approved lender or eligible holder, and shall notify NSLP of
               any proposed transfer of NSLP guaranteed loans by sale, payoff or
               pledge to such approved lender or eligible holder.



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   18.         This Agreement may be terminated by the Lender upon ninety
               (90) days advance written notice to NSLP. The Lender is required
               to give NSLP ninety (90) days advance written notice of
               termination if the Lender intends to cease making Eligible Loans
               under this Agreement. This Agreement may be terminated, suspended
               or limited by NSLP in any manner provided for in the Program
               Rules. Such termination, suspension or limitation shall not
               affect the coverage of Eligible Loans previously guaranteed.

               In addition, this Agreement may be terminated by NSLP upon ninety
               (90) days written notice to the Lender in the event NSLP intends
               to cease guaranteeing Eligible Loans of Lender. Lender will have
               90 days from receipt of the termination notice to obtain a
               guarantee from NSLP on all Eligible Loans acquired prior to
               receipt of the termination notice.

   19.         Lender agrees to indemnify and hold harmless NSLP from any
               obligations arising out of or related to Eligible Loans not
               originated, acquired or serviced in the manner required by the
               Act and the Program Rules.

   20.         NSLP agrees to reimburse the Lender for any federal special
               allowance payments lost with respect to an individual loan as a
               result of a delay in payment of a claim under this Agreement by
               NSLP to the Lender with respect to such loan, provided that such
               reimbursement is permissible under the Act and the Program Rules
               and further provided that such delay is not due to Lender's (or
               its servicer's) actions.

   21.         NSLP agrees upon written request to furnish a copy of its most 
               recent audited financial statements to any holder of record of
               Notes or Certificates (each as defined in the Trust Agreement) of
               KeyCorp Student Loan Trust 1999-A.

   22.         This Agreement shall be governed by the laws of the State of
               Nebraska, except to the extent federal law and/or regulations
               apply to the subject matter hereof. This Agreement shall not be
               varied by oral agreement but only by an instrument in writing
               duly executed by both parties. Any legal or equitable judicial
               proceeding arising out of or related to this Agreement shall be
               heard solely in the courts located in the City of Lincoln,
               Lancaster County, Nebraska, as the forum of choice of the parties
               to this Agreement. This Agreement represents the entire
               understanding of the parties with respect to the subject matter
               and supersedes all other communications between the parties.



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               This Agreement is made as of July 13, 1998.


                                             THE FIRST NATIONAL BANK OF CHICAGO,
                                             not in its individual capacity, but
                                             solely as Eligible Lender Trustee
                                             on behalf of KeyCorp Student Loan
                                             Trust 1999-A:

ATTEST:


By:                                         By:
   -----------------------------               ---------------------------------

Title:                                      Title:
      --------------------------                  ------------------------------

                                            NEBRASKA STUDENT LOAN PROGRAM, INC.

ATTEST:


By:                                         By:
   -----------------------------               ---------------------------------
                                                  Nancy J. Wiederspan, President

Title:                                      
      --------------------------       




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                        LENDER AGREEMENT FOR GUARANTEE OF
              FEDERAL CONSOLIDATION LOANS WITH FEDERAL REINSURANCE



       For loans eligible for guarantee under the Higher Education Act of
1965, as amended (the "Act")

       WHEREAS, The First National Bank of Chicago, not in its individual
capacity but solely as Eligible Lender Trustee on behalf of the KeyCorp Student
Loan Trust 1999-A (the "Trust"), pursuant to the Trust Agreement dated as of
July 13, 1998, between Key Bank USA, National Association and the Eligible
Lender Trustee, as the same may be amended, including by way of amendment and
restatement, from time to time (the "Trust Agreement") located at, One First
National Plaza, Suite 0126, Chicago, Illinois 60670, Attn: Corporate Trust
Administration, using DE Lender ID number 833220 (the "Lender") wishes to secure
loan guarantees with the Nebraska Student Loan Program, Inc. ("NSLP") on
"Federal Consolidation Loans" (as hereinafter defined) made to "Eligible
Borrowers" (as hereinafter defined); and

       WHEREAS, Lender represents that it is an "eligible lender" under the
provisions of the Act and the "Program Rules" (as hereinafter defined); and

       WHEREAS, Lender has previously executed the NSLP Lender Agreement for
Guarantee of Student Loans with Federal Reinsurance.

       NOW, THEREFORE, it is mutually agreed that:

       1.     The following words and terms shall have the following meanings
              unless otherwise herein provided or unless that context or use
              clearly indicates another or differing meaning or intent;

              (a) "Act" shall mean Title IV, Part B, of the Higher Education
                  Act of 1965, as amended, the regulations promulgated
                  thereunder, and all official interpretations of federal
                  requirements as issued by the U.S. Department of Education
                  ("ED");

              (b) "Agreement" shall mean this Agreement;

              (c) "Eligible Borrower" shall mean a borrower as defined by the
                  Act;

              (d) "Eligible Loan" shall mean a loan as defined by the Act;

              (e) "Federal Consolidation Loan" shall mean a student loan which
                  has been consolidated pursuant to and as defined by the Act;

              (f) "Initial Principal Amount" shall mean the principal amount
                  of a Federal Consolidation Loan when made; and

              (g) "Program Rules" shall include, but are not limited to, the
                  Act, all correspondence, the Common Manual - Unified Student
                  Loan Policy, NSLP Operations Alerts and NSLP 


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                  correspondent materials. All such Program Rules, as amended
                  from time to time, are specifically incorporated into and
                  made a part of this Agreement.

       2.     NSLP shall guarantee Federal Consolidation Loans made or acquired
              by the Lender which have been made in conformance with the Program
              Rules.

       3.     NSLP and the Lender agree that upon the default with respect to a
              promissory note and the filing of a claim on such promissory note
              by the Lender, such claim shall be processed as provided for in
              the Program Rules.

       4.     NSLP agrees to maintain reserves as defined by the Act for the
              payment of claims/purchase of loans pursuant to the reinsurance
              contracts with the Secretary of Education.

       5.     Lender shall make a Federal Consolidation Loan only to discharge
              Eligible Loans upon an Eligible Borrower's request.

       6.     Lender shall make a Federal Consolidation Loan only to those
              Eligible Borrowers permitted by the Program Rules.

       7.     With respect to each Federal Consolidation Loan, the Lender, or
              its servicers, shall determine as to each Eligible Loan obligation
              to be consolidated that each obligation:

              (a)    is a legal, valid and binding obligation of the Eligible
                     Borrower;

              (b)    was made and has been continuously serviced in accordance
                     with applicable laws and regulations and, if guaranteed,
                     requirements of the guarantor;

              (c)    each underlying loan is currently guaranteed under the Act
                     as of the date of the consolidation; and

              (d)    is not in default status as defined under the Act or the
                     Program Rules.

              Lender, or its servicers, shall document in the loan file the
              basis on which it made its determination and retain that
              documentation for the term required by the Program Rules. Lender
              acknowledges that NSLP has no responsibility to review such
              determination of Lender.

       8.     Unless otherwise required by the Act, each Federal Consolidation
              Loan shall be made in a principal amount which is equal to the sum
              of the unpaid principal and accrued unpaid interest and late
              charges of the Eligible Loans to be consolidated. The proceeds of
              each Federal Consolidation Loan will be paid to the holder of each
              loan to be consolidated to discharge the liability on such loans.

       9.     Each Federal Consolidation Loan shall be made at the interest rate
              designated by the Act.





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       10.    Each Federal Consolidation Loan shall be subject to repayment on
              the terms stated in the Act.

       11.    The Lender agrees to remit to NSLP any applicable fees permitted
              by the Act and required by NSLP.

       12.    NSLP and the Lender agree that the guarantee on any particular
              Federal Consolidation Loan shall be effective for the term of that
              Federal Consolidation Loan determined in accordance with the
              Program Rules, the effective date beginning on the date of receipt
              by NSLP of any fee with respect to that Federal Consolidation Loan
              or, if no fee is permitted or required, beginning on the date of
              disbursement of that Federal Consolidation Loan.

       13.    In making Federal Consolidation Loans to Eligible Borrowers, the
              Lender agrees to comply with all applicable federal and state laws
              in addition to (and not in conflict with) the Program Rules.

       14.    The Lender agrees to notify NSLP in writing within 60 days from
              the date that each Federal Consolidation Loan is made by Lender.

       15.    The Lender shall maintain for all Federal Consolidation Loans
              guaranteed a system of records and accounts, shall afford access
              thereto, and shall furnish such periodic and separate reports as
              may reasonably be required by the ED and NSLP under the Program
              Rules. For Federal Consolidation Loans paid in full or otherwise
              discharged, the records shall be retained by the Lender as
              required by the Program Rules.

       16.    NSLP shall guarantee Federal Consolidation Loans without regard to
              sex, age, race, color, religion, handicapped status, income,
              national origin, or any other basis prohibited by applicable law.
              The Lender will not discriminate in the making of loans to
              Eligible Borrowers or in the treatment of such Eligible Borrowers
              on any prohibited basis.

       17.    This Agreement shall inure to the benefit of and be binding upon
              NSLP, the Lender, and their respective successors. The rights of
              Lender hereunder may be assigned in whole or in part by Lender to
              any permitted successor or to any purchaser of all or any part of
              its interest in the loans covered by this Agreement without NSLP's
              approval; provided, however: (i) that NSLP shall be given advance
              notice of such assignment and (ii) that Lender's obligations
              hereunder shall be assumed by any such successor or purchaser in
              writing. NSLP acknowledges that Lender will pledge the loans
              covered by this Agreement and all its rights hereunder to Bankers
              Trust Company, not in its individual capacity but solely as
              Indenture Trustee ("Indenture Trustee"), and agrees that in the
              event Indenture Trustee forecloses upon such collateral, Indenture
              Trustee may exercise any or all of Lender's rights hereunder.




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       18.    Subject to the prior written approval of the Lender, which
              approval shall not be unreasonably withheld, NSLP may transfer
              Federal Consolidation Loans which are guaranteed to any other
              guarantor which has given NSLP its prior written approval of such
              transfer.

       19.    This Agreement may be terminated by the Lender upon ninety (90)
              days advance written notice to NSLP. The Lender is required to
              give NSLP ninety (90) days advance written notice of termination
              if the Lender intends to cease making Federal Consolidation Loans
              under this Agreement. This Agreement may be terminated, suspended
              or limited by NSLP in any manner provided for in the Program
              Rules. Such termination, suspension, or limitation shall not
              affect the coverage of Federal Consolidation Loans previously
              guaranteed.

              In addition, this Agreement may be terminated by NSLP upon ninety
              (90) days written notice to the Lender, in the event that NSLP
              intends to cease guaranteeing Federal Consolidation Loans of
              Lender. Upon receipt of the termination notice, Lender shall
              immediately cease origination and disbursement of all
              Consolidation Loans. Lender will have 90 days from receipt of the
              termination notice to obtain a guarantee from NSLP on all
              Consolidation Loans originated and disbursed prior to receipt of
              the termination notice.

       20.    Lender agrees to indemnify and hold harmless NSLP from any
              obligations arising out of or related to Federal Consolidation
              Loans not originated by Lender and serviced in the manner required
              by the Act and the Program Rules.

       21.    NSLP agrees to reimburse the Lender for any federal special
              allowance payments lost with respect to an individual loan as a
              result of a delay in payment of a claim under this Agreement by
              NSLP to the Lender with respect to such loan, provided that such
              reimbursement is permissible under the Act and the Program Rules
              and further provided that such delay is not due to Lender's (or
              its servicer's) actions.

       22.    NSLP agrees upon written request to furnish a copy of its most
              recent audited financial statements to any holder of record of
              Notes or Certificates (each as defined in the Trust Agreement) of
              KeyCorp Student Loan Trust 1999-A.

       23.    This Agreement shall be governed by the laws of the State of
              Nebraska, except to the extent federal law and/or regulations
              apply to the subject matter hereof. This Agreement shall not be
              varied by oral agreement but only by an instrument in writing duly
              executed by both parties. Any legal or equitable judicial
              proceeding arising out of or related to this Agreement shall be
              heard solely in the courts located in the City of Lincoln,
              Lancaster County, Nebraska, as the forum of choice of the parties
              to this Agreement. This Agreement represents the entire
              understanding of the parties with respect to the subject matter
              and supersedes all other communications between the parties.



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       24.    Nothing contained in this Agreement amends or modifies in any way
              the Nebraska Student Loan Program, Inc. Lender Agreement for
              Guarantee of Student Loans with Federal Reinsurance between Lender
              and NSLP, including any addendum or amendment to that agreement.

              This Agreement is made as of July 13, 1998.



                                            THE FIRST NATIONAL BANK OF CHICAGO,
                                            not in its individual capacity, but
                                            solely as Eligible Lender Trustee
                                            on behalf of KeyCorp Student Loan
                                            Trust 1999-A:

ATTEST:


By:                                         By:
   -----------------------------               ---------------------------------

Title:                                      Title:
      --------------------------                  ------------------------------

                                            NEBRASKA STUDENT LOAN PROGRAM, INC.

ATTEST:


By:                                         By:
   -----------------------------               ---------------------------------
                                                  Nancy J. Wiederspan, President

Title:                                      
      --------------------------       





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