Founded in 1832 and headquartered in Boston, Houghton Mifflin Harcourt develops interactive learning solutions for pre-K–12 education. They collaborate with school districts, teachers, parents, and students to advance teacher effectiveness and student achievement. The company also publishes reference works and literature for readers worldwide. With over 50 million students in 150 countries, Houghton Mifflin Harcourt is committed to transforming lives through learning.