The Lemonade Problem

When life gives them a problem to solve, Peg and Cat make lemonade and get a lesson in bartering in a refreshing new math adventure. It s a hot day, so what could be cooler than setting up a lemonade stand? When Peg needs some marbles to keep her special marble company, she and Cat decide to sell lemonade in exchange for ten marbles a cup. But the Teens have other ideas. “But just one cup for ten marbles?” says Mora. “I m not made of marbles!” So Peg and Cat keep changing their sign until they hit a price two marbles! that has customers lining up. There s just one problem: Peg and Cat forgot the cups! Can they barter their way back into business or will they end up totally freaking out?”