Houghton Mifflin Math Homework Book (Consumable) Grade 1 Houghton Mifflin Math Provide lesson-specific practice of key concepts, skills and problem solving for after school or at home with this consumable book. Also included as blackline masters in the Unit Resources. Grade: 1 Material Type: Resource Materials Format: Softcover, 160 Pages ISBN-13/EAN: 9780618698806 ISBN-10: 0618698809 Product Code: 179601 National/State: National Copyright Year: 2007