Information on all of the items in the Textbook collection from Houghton Mifflin Harcourt and its imprints. Please click on the catalog links to find out information about grades covered and specific holdings. Many readers referred to in these textbooks may be found in the Juvenile Literature collection. Just search by the title in our catalog!. Mifflin Harcourt Publishing Company. You shall not display, disparage, dilute or taint Houghton Mifflin Harcourt trademarks and service marks or use any confusingly similar marks, or use Houghton Mifflin Harcourt marks in such a way that would misrepresent the identity of the owner. Any permitted use of Houghton Mifflin Harcourt trademarks and. 4th Grade Social Studies-Our Country and Its Regions For access to the textbook: textbook--Unit 1.pdf textbook--Unit 3.pdf textbook--Unit 4.pdf textbook--Unit 5.pdf. 4 - Equivalent Fractions, Simplifying Fractions and Common Denominators Grade: 6, Title: Go Math! 6 Common Core Edition, Publisher: Houghton Mifflin Harcourt, ISBN: 547587783 Grade 4 Go Math 1 Shed the societal and cultural narratives holding you back and let step-by-step GO Math: Middle School Grade 8 textbook solutions reorient your old.