Houghton Mifflin Harcourt Company (HMH) is a leading provider of Kindergarten through 12th grade (K-12) core curriculum, supplemental and intervention solutions, and professional learning services, HMH partners with educators and school districts to uncover solutions that unlock students' potential and extend teachers' capabilities. HMH estimates that it serves more than 50 million students and three million educators in about 150 countries. The company specializes in comprehensive core curriculum, supplemental and intervention solutions, and provides ongoing support in professional learning and coaching for educators and administrators.