An easy-to-follow and engaging homeschool curriculum, Horizons 4th Grade Math Student Books 1 & 2 by AOP includes 160 colorful, consumable lessons that lay a solid foundation in Math. Using Horizons spiral learning method, each student book will help your child grasp basic math concepts quickly. With a cycle of concept introduction, review, and reinforcement, your child will master concepts like prime and composite numbers, adding and subtracting up to 6-digit numbers with borrowing, addition and subtraction of like and unlike fractions, review of time, time equivalents, and time zones, and much more. Horizons Math curriculum is parent-led, with detailed lesson plans, resources, and materials provided to parents in the Horizons 4th Grade Math Teacher's Guide (sold separately). Designed to correlate with lessons in the Teacher's Guide, the Horizons 4th Grade Math Student Books 1 & 2 provide a variety of activities that will reinforce the concepts your child has learned.