About Us

Houghton Mifflin Harcourt Publishing Company combines a tradition of excellence with a commitment to innovation, providing comprehensive best-in-class pre-K–12 educational solutions, research-based assessments, and award-winning literature and reference materials.

Houghton Mifflin Harcourt represents the brands of Houghton Mifflin Harcourt School Publishers • Holt McDougal • Rigby • Saxon • Great Source • Steck-Vaughn • Houghton Mifflin Harcourt Learning Technology • The Riverside Publishing Company • Houghton Mifflin Harcourt International Publishers • Houghton Mifflin Harcourt Trade and Reference Publishers • Greenwood-Heinemann