EXHIBIT (a)(7)

J. MICHAEL BOWLES
TRUSTEE UNDER THE WAVE TECHNOLOGIES INTERNATIONAL, INC.
PROFIT SHARING AND 401(k) PLAN

NOTICE TO PARTICIPANTS

March 22, 2000

Dear Participants of the Wave Technologies International, Inc. Profit Sharing
and 401(k) Plan:

As a holder of shares of common stock, par value $0.50 per share (the
"Shares") of Wave Technologies International, Inc. (the "Company"), we are
delivering to you with this letter a copy of the Offer to Purchase, dated March
22, 2000 (the "Offer to Purchase"), and the Solicitation/Recommendation
Statement of the Company in connection with the offer by WTI Acquisition
Corporation, a Delaware corporation ("Purchaser") and a wholly owned subsidiary
of The Thomson Corporation, a corporation organized under the laws of Ontario,
Canada ("Thomson"), to purchase all outstanding Shares at a price of $9.75 per
Share, net to the seller in cash, upon the terms and subject to the conditions
set forth in the Offer to Purchase (the "Offer").

Any Shares held by you through the Wave Technologies International, Inc.
Profit Sharing and 401(k) Plan (the "Plan") and held by the undersigned on your
behalf as the Trustee of the Plan (the "Trustee") may be tendered by the Trustee
pursuant to your instructions. The Offer will expire at 12:00 Midnight, New York
City Time, on April 18, 2000 (the "Expiration Date"), unless it is extended
pursuant to the terms of the Offer to Purchase, in which event the term
"Expiration Date" shall mean the latest time and date at which the Offer shall
expire.

To instruct the Trustee to tender Shares held by the Trustee in your Plan
account at the time of the Expiration Date and to deliver such Shares to the
depositary for the Offer (the "Depositary"), please complete the attached
instruction form and return it to the Trustee in the envelope provided prior to
6:00 P.M., New York City time (5:00 P.M. St. Louis time) on or before Friday,
April 14, 2000, the date which is two business days prior to the current
Expiration date, so that the Trustee may properly tender such Shares to the
Depositary prior to the Expiration Date. Please note that if the instruction
form is not received on or before 6:00 P.M., New York City time (5:00 P.M St.
Louis time), on Friday, April 14, 2000, there is no assurance that your
instructions will be followed.

In order to ensure that your instructions to the Trustee remain
confidential, please return the instruction form directly to the Trustee. Your
instructions to the Trustee will be kept confidential.

If you previously signed and returned a Letter of Transmittal in connection
with Shares held by you outside your Plan account, you must still complete the
instruction form and return it to the Trustee in order to tender Shares held by
you in your Plan account. The instruction form will serve as confirmation of
your tender of the Shares held by the Trustee in your Plan account and as
authorization for the Trustee to deliver such Shares to the Depositary.

If you have any questions with regard to the Offer to Purchase and
associated tender materials in connection with the Offer, or if you have not
received any of the Offer materials, please call Innisfree M&A Incorporated at
(888) 750-5834.

If you have any questions with regard to your Plan account Shares held by
the Trustee, please call the Trustee's staff at (800) 994-5767.

Sincerely,

J. Michael Bowles
Trustee
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THE WAVE TECHNOLOGIES INTERNATIONAL, INC.
PROFIT SHARING AND 401(K) PLAN

INSTRUCTION TO TRUSTEE WHETHER TO TENDER SHARES

The undersigned participant in the Wave Technologies International, Inc.
Profit Sharing and 401(k) Plan (the "Plan") hereby instructs J. Michael Bowles,
as Trustee under the Plan (the "Trustee"), to tender or not to tender, pursuant
to the Offer, the Shares held in his or her account under the Plan (as explained
in the accompanying Notice to Participants) in accordance with the instruction
form on the reverse side of this form.

THIS FORM MUST BE PROPERLY COMPLETED, SIGNED, DATED AND RECEIVED BY THE
TRUSTEE NO LATER THAN 6:00 P.M. NEW YORK CITY TIME (5:00 P.M. ST. LOUIS TIME) ON
FRIDAY, APRIL 14, 2000.

If the expiration of the Offer is extended beyond its scheduled expiration
time, the time by which the Trustee must receive your instructions will be
extended automatically to 6:00 P.M., New York City time (5:00 P.M. St. Louis
time) on the third business days prior to such extended expiration time.

IF THIS FORM IS RECEIVED AFTER 6:00 P.M. NEW YORK CITY TIME (5:00 P.M. ST.
LOUIS TIME) ON FRIDAY, APRIL 14, 1999, THE TRUSTEE CANNOT ENSURE THAT YOUR
INSTRUCTIONS WILL BE FOLLOWED. YOUR INSTRUCTIONS ARE CONFIDENTIAL AS EXPLAINED
IN THE ACCOMPANYING NOTICE TO PARTICIPANTS.
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TO BE COMPLETED, SIGNED AND DATED ON THE REVERSE SIDE.

[X] Please mark your choice like this and sign and date below.

THE TRUSTEE MAKES NO RECOMMENDATIONS AS TO YOUR DECISION TO TENDER OR NOT TO
TENDER SHARES HELD IN YOUR ACCOUNT UNDER THE PLAN PURSUANT TO THE OFFER.

[ ] Tender ALL of the Shares held in my account under the Plan.

[ ] Tender the percentage of Shares held in my account under the Plan indicated
below:
Percentage of Shares (in whole numbers): %

[ ] Do not tender any Shares held in my account under the Plan.

As a participant in the Plan, I acknowledge receipt of the Offer to
Purchase, Solicitation/Recommendation Statement and the Notice to Participants
dated March 22, 2000, and I hereby instruct the Trustee of the Plan to tender or
not to tender the Shares held in my account under the Plan as indicated above.

I understand that if I sign, date and return this instruction form but do
not provide the Trustee with Specific instructions, the Trustee will treat this
instruction form as not providing any instruction to the Trustee regarding the
Offer. In accordance with the terms of the trust which is the funding vehicle
for the Plan, the Trustee will not sell any Shares held by the Plan for which no
participant instructions are timely received unless it determines that it is
legally obligated to do so.

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SIGNATURE DATE

PLEASE SIGN, DATE AND MAIL THIS INSTRUCTION FORM PROMPTLY
IN THE POSTAGE PREPAID ENVELOPE PROVIDED