"Use Your Math Power Series by Nancy Belkov illustrations by Dana Regan "Time for a new math problem," announced Ms. Green. "Oh no Not another hard one " Mia plopped down on the rug next to Ben. Ms. Green read the problem. "A zoo wants to buy 13 monkeys. It wants some howler monkeys and some spider monkeys. Figure out how many of each the zoo can buy." Welcome to Ms. Green's class, where math is challenging and fun. Ms. Green's students ask questions, try out different ideas, and believe in their math power. Use your math power to help Mia and her friends buy monkeys for the zoo #133032 $7.95"