Houghton Mifflin Co. - 02/24/06

Houghton Mifflin to Participate in the Merrill Lynch Annual Internet, Advertising, Information & Education Conference

BOSTON—February 24, 2006—Houghton Mifflin Company today announced that management will present at Merrill Lynch’s annual Internet, Advertising, Information & Education Conference in New York. The presentation is scheduled for Wednesday, March 1, 2006, from 8:40 a.m. to 9:20 a.m. EST. Scheduled to present are:

• Tony Lucki, President and Chief Executive Officer
• Steve Richards, Executive Vice President, Chief Financial Officer and Chief Operating Officer

The presentation will be available via live webcast and accessible at the following link: http://www.veracast.com/ml/internet06/enter_mlx.cfm

An audio replay will also be available beginning twenty-four hours after the presentation and will remain accessible at the same link through March 8, 2006.

About Houghton Mifflin
Boston-based Houghton Mifflin Company is one of the leading educational publishers in the United States, with more than $1 billion in sales. Houghton Mifflin publishes textbooks, instructional technology, assessments and other educational materials for elementary and secondary schools and colleges. The Company also publishes an extensive line of reference works and award-winning fiction and nonfiction for adults and young readers. With its origins dating back to 1832, Houghton Mifflin combines its tradition of excellence with a commitment to innovation. The Company's Web site can be found at www.hmco.com.