Houghton Mifflin Co. News Release - March 28, 2007

McDougal Littell and Kinetic Books Join Together to Boost High School Students' Achievement in Physics

ST. LOUIS — March 28, 2007— McDougal Littell, a division of Houghton Mifflin Company, and Kinetic Books today announced a groundbreaking partnership to help high school students better learn physics. McDougal Littell will exclusively offer Kinetic Books' Conceptual Physics digital textbook and virtual physics labs in its product line, and develop a print version of the textbook with supplemental materials to create a comprehensive educational solution.

"Research confirms that students learn more when they're engaged in the subject," said Susan Schaffrath, editor in chief, McDougal Littell. "As a Company, we are committed to providing highly effective educational materials that steer student success. With Conceptual Physics, every learner is an active learner. All students, whatever their interests or capabilities, can learn the fundamentals of physics. McDougal Littell and Kinetic Books together are taking a great step forward for the teaching of high school physics."

We are flattered that such an esteemed publishing company as McDougal Littell is seeing the advantage of our truly interactive textbook," said Bruce Jacobsen, CEO and founder, Kinetic Books. "The agreement with McDougal Littell is a huge achievement, and—alongside our 100 percent success rate in state adoptions and recent addition to the College Board's Advanced Placement^® program list—further supports our dedication to provide students with quality interactive textbooks that meet curriculum standards. We appreciate the value of McDougal Littell in developing the print version of Conceptual Physics as well as their ability to develop further supplementary material."

The complete Conceptual Physics program—which includes digital and print textbooks and virtual physics labs—will be available for implementation during the 2007–2008 school year.

About McDougal Littell
McDougal Littell, a division of Houghton Mifflin Company, is among the fastest growing publishers in the United States, recognized for its innovation, dedication and responsiveness to the needs of educators. Based in Evanston, Illinois, the Company publishes print and technology materials for language arts, mathematics, social studies, world languages, and science for grades 6 through 12. The Company's Web site can be found at www.mcdougallittell.com.

About Houghton Mifflin
Boston-based Houghton Mifflin Company is one of the leading educational publishers in the United States, with more than $1.4 billion in sales. The Company publishes a comprehensive set of educational solutions, ranging from research-based textbook programs to instructional technology to standards-based assessments 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. In 2006, Houghton Mifflin merged with Riverdeep, bringing together one of the most respected print publishers with the leader in interactive courseware. With origins dating back to 1832, Houghton Mifflin combines its tradition of excellence with a commitment to innovation. To learn more about Houghton Mifflin, visit www.hmco.com.

About Kinetic Books Company^®
Kinetic Books Company creates and publishes Kinetic Textbooks™, the next generation of digital curriculum. Kinetic Books' textbooks and virtual labs are teaching students in hundreds of high schools and tertiary institutions in 40 states and 15 countries. The company's full line of textbooks has been adopted in every state that has gone through a physics text approval process since Kinetic Books introduced its products in 2005. Two of the company's physics textbooks, Principles of Physics and Physics for Scientists and Engineers, have met with the College Board AP course audit requirements. Experiment with Kinetic Books physics curriculum, or find out more about the company, at www.kineticbooks.com.