EXHIBIT 23 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in this Annual Report (Form 10-K) of National Computer Systems, Inc. of our report dated March 6, 2000, included in the 1999 Annual Report to Stockholders of National Computer Systems, Inc. We also consent to the incorporation by reference in: Registration Statement No. 33-9830 on Form S-3 (Selling Shareholder), Registration Statement No. 33-21511 on Form S-8 (1986 Employee Stock Option Plan), Registration Statement No. 333-00377 on Form S-8 (1989 Non-Employee Director Stock Option Plan), Registration Statements No. 33-48509 and 333-00381 on Form S-8 (1990 Employee Stock Option Plan), Registration Statement No. 333-00379 on Form S-8 (1990 Long-Term Incentive Plan), Registration Statement No. 33-48510 on Form S-8 (1992 Employee Stock Purchase Plan), Registration Statement No. 33-68854 on Form S-8 (Option held by former director), Registration Statement No. 333-00383 on Form S-8 (1995 Employee Stock Option Plan), Registration Statement No. 333-25523 on Form S-3 (VUE Selling shareholders), Registration Statement No. 333-25343 on Form S-8 (NCS/VUE Stock Option Plan), Registration Statement No. 333-51053 on Form S-8 (Oswald Stock Option Plan), Registration Statement No. 333-58947 on Form S-8 (1997 Long-Term Incentive Plan), Registration Statement No. 333-58949 on Form S-8 (1998 Employee Stock Purchase Plan), Registration Statement No. 333-58951 on Form S-8 (1997 Employee Stock Option Plan), and Registration Statement No. 333-75165 on Form S-8 (Supplemental Deferred Compensation Plan) of our report dated March 6, 2000 with respect to the consolidated financial statements of National Computer Systems, Inc. and subsidiaries incorporated herein by reference in this Annual Report (Form 10-K) of National Computer Systems, Inc. for the year ended January 29, 2000. /s/ ERNST & YOUNG LLP Minneapolis, Minnesota April 25, 2000