As of 2015, some textbooks published by Houghton Mifflin Harcourt include "The Earth and Its Peoples: A Global History," "Houghton Mifflin English," "Write Source" and "Write Traits." Houghton Mifflin Harcourt publishes textbooks in subjects such as English, language arts, science and math. The textbook range from early childhood to university level courses.
One of the textbooks, "Houghton Mifflin English," is part of the elementary English program for kindergarten through sixth grade. The textbooks focus on the goals of the Common Core State Standards, including exercises in writing and grammar.
Other textbooks published by Houghton Mifflin Harcourt include "Vocabulary for Achievement," "Writers INC" and "Houghton Mifflin Harcourt Handwriting."