Penny Penelope Payne can't make sense of her math homework. Her mother saves the day with the story of Digit in the Base Ten Woods. This squirrel has to think fast when family members (and other surprise guests) keep arriving with more acorns. Where can he store them when his shelves are full? Read this story to children ages 6, 7, 8, 9, 10, and 11 to teach about place value, bundling numbers as they move up to the next place, and multiplying by tens...