7/21/2004

Press Release
Thomson Learning Announces Acquisition of Group Modulo Inc.

Tuesday July 20, 12:57 pm ET

TORONTO, July 20 /CNW/ -- Thomson Learning, a part of The Thomson Corporation (TSX: TOC - News; NYSE: TOC - News), the world's largest provider of corporate and professional learning solutions, today announced the acquisition of Group Modulo, Inc., by Thomson Canada Ltd.

Group Modulo, Inc., based in Montreal, Quebec Canada, is a French-language publisher of textbooks for the K-12 and post-secondary markets. The addition of Modulo is a key growth opportunity for Thomson as it provides an entre into the French-language markets in both the school and higher education segments. The acquisition of Modulo provides Thomson with the opportunity to better serve its customers.

" This acquisition is an excellent fit with other Thomson offerings and gives us a strong position in the French first language market across Canada," said George W. Bergquist, president of Thomson Nelson. "Thomson is committed to providing our customers with the best learning materials possible. Through this acquisition we add a significant number of exceptional authors and products to the list of offerings available from Thomson.

" Modulo has a long standing history in Quebec. The sale of Modulo to Thomson Canada Limited provides a great opportunity for our authors and our employees to continue the development of materials for the new Curriculum in Quebec and materials for Canadian schools," said Roger Turcotte, sole owner of Group Modulo Inc.

The closing date for the acquisition is July 19, 2004.

Further terms of the agreement have not been disclosed.

About The Thomson Corporation
The Thomson Corporation (http://www.thomson.com), with 2003 revenues of $7.6 billion, is a global leader in providing integrated information solutions to business and professional customers. Thomson provides value-added information, software tools and applications to more than 20 million users in the fields of law, tax, accounting, financial services, higher education, reference information, corporate training and assessment, scientific research and healthcare. With operational headquarters in Stamford, Conn., Thomson has approximately 39,000 employees and provides services in approximately 130 countries. The Corporation's common shares are listed on the New York and Toronto stock exchanges (NYSE: TOC - News; TSX: TOC - News). Its learning businesses and brands serve the needs of individuals, learning institutions, corporations and government agencies with products and services for both traditional and distributed learning. Nelson (http://www.nelson.com) is a leading provider of books and online resources for the educational market in Canada, maintaining over 30 interactive Web sites and publishing a wide range of core and supplemental electronic products.

About Groupe Modulo
Groupe Modulo Inc. was founded in Montreal Quebec Canada in 1975 by 12 mathematics teachers from a local Jesuit college in the city of Montreal. Initially the company's sole offerings were in mathematics however over the years the publishing programs were expanded widely to include all multiple disciplines in all grade levels.

For further information

Marlene Nyilassy, Senior Vice President, Human Resources,
Thomson Nelson, +1-416-750-6670,
Marlene.Nyilassy@thomson.com

Roger Turcotte, President-Director-General,
Modulo, +1-514-738-9818,
turcotte@modulo.ca

Adam Gaber, Director, Public Relations,
Thomson, +1-203-539-8663,
Adam.Gaber@thomson.com
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Source: Thomson Corporation