Houghton Mifflin is a leading publisher in the U.S. education, testing, trade and reference markets. In the “K-12” market, the Company focuses on core subjects such as reading, language arts, literature, math, world languages and social studies. In the college market, the company targets introductory courses with the largest enrollments. Houghton Mifflin also publishes an extensive line of fiction and non-fiction adult and children’s books, dictionaries and other reference materials and also provides various testing and assessment products and services.