Houghton Mifflin is an educational publisher of text books, instructional technology, assessments and other educational materials for teachers and students of every age.
This site is a learning and information resource that aims to help parents, students and teachers in the classroom and at home. At the same time, it provides teachers with online tools and resources that save time and add fun to their classes such as lessons plans, bilingual resources and quizzes. And for students it has some services such as educational games, special projects and instant homework help. If you are a teacher or a student, this site is an interesting choice to get ideas on how to cope with your everyday activities. 
