the four self-teaching books entitled Addition Math Facts, Subtraction Math Facts, Multiplication Math Facts, & Division Math Facts contain 296 problems with colorful graphics & clue words to aid in increasing speed & accuracy. Say the answer & turn the page to check it. While learning math facts, other interesting facts that match the answer numbers will be learned like the number of backbones in a horse, signatures on the Declaration of Independence, & players on a football team. The multiplication book has multiplication tables through the 12s. These books can be used over & over to help prepare students for lessons, tests, & drills. This series is ideal for children & adults, parents, tutoring, school curriculum, review, & traveling.