The very Hungry Caterpillar written by Eric Carle is a 2.9 on the Accelerated Reading leveling system. The story follows the week of a caterpillar as he eats quite a bit of food. The caterpillar eats so much in the end, he turns into a butterfly. The illustrations are eye catching and interesting. This simple book can be used to teach the days of the week to early learners, but also the life cycle of a butterfly to older elementary.