Houghton Mifflin Co. News Release - June 6, 2007

Riverside Publishing's Edusoft Assessment Management System Selected by Washoe County School District

CHICAGO — June 6, 2007 — Riverside Publishing, a division of Houghton Mifflin Company and a leader in comprehensive educational standards-based assessment, today announced that the Washoe County School District in Nevada has selected the Edusoft^® Assessment Management System as its formative assessment solution. Washoe is the second-largest district in Nevada and serves approximately 65,000 students.

The Edusoft Assessment Management System is a district-wide assessment solution that provides practical assessment products, tools and services to improve student achievement. Educators can either add their own district assessments or develop customized benchmark tests using Riverside's Assess2Know^® item banks and Edusoft online test development tools. Tests can be delivered either online or on paper.

"We enter into each new district relationship as an ongoing partnership, with the ultimate goal of achieving student success," said Rick Perez, vice president of sales for Riverside. "As with all customers, our dedicated team of professionals will provide Washoe with expert service and support before, during and after the Edusoft implementation."

"Riverside's professional and thorough response to our RFP combined with their reputation and alignment of overall product functionality to our district goals were key factors in the selection process," said Bryn Lapenta, interim assistant superintendent for Public Policy, Special Projects and Legislation for Washoe County School District.

Washoe purchased all four Edusoft system modules: State Analysis, Benchmarking, Teacher Tools and Curriculum Management. The district also purchased the services of a full-time Riverside employee acting as a "Dedicated Account Manager," as well as Assess2Know item banks for Reading, Math and Science.

About the Edusoft Assessment Management System
With over 50 million tests scored in over 400 school districts, the award-winning Edusoft Assessment Management System is the most widely used assessment system in K–12 education. Utilizing Assess2Know quality item banks, test development and data analysis tools, customers can quickly pinpoint student needs and improve instruction and learning.

About Riverside Publishing
As a charter member of the Association of Test Publishers, Riverside serves both the K–12 educational assessment market and the clinical assessment market with print, CD-ROM and online assessment tools. Among Riverside flagship products are The Iowa Tests^®, the Edusoft^® Assessment Management System and the Woodcock-Johnson^® III comprehensive assessment system. Riverside also develops custom, scientifically research-based solutions to meet the unique needs of states and school districts across the nation. Riverside Publishing was established as a wholly owned subsidiary of Houghton Mifflin in 1979. Information on Riverside products and services can be found at www.riversidepublishing.com or by calling 800-323-9540.

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.