Applying math to daily life is challenging for most first graders; even Zac has trouble sometimes! But Mrs. Walker has the answers. Teachers, parents, and first graders will enjoy using Backyard Math with Zac to review the more difficult Grade 1 math concepts. As supplemental review with the educational materials, summer review, or home enrichment, Zac and Mrs. Walker will enhance your first-grade math learning experience. A resource for math. Suitable for lower elementary.