When Annie's at summer camp, she discovers that she needs to clean up her cabin! She quickly realizes that teamwork makes the dream work as she and her eight messy bunk mates who end up winning the camp prize for cleanest cabin. With engaging stories that connect math to kids’ everyday lives, each book in the Teachers’ Choice Award–winning Math Matters series focuses on a single concept and reinforces math vocabulary and skills. Bonus activities in the back of each book feature math and reading comprehension questions, and even more free activities online add to the fun! (Math topic: Fractions)