From the series Red Rocket Readers Decodable Explorers.

How does a tiny tadpole change into a frog? All a tadpole can do is swim in the water like a fish. But when it is a frog, it can hop and jump on the land. It can dive and swim and float, too. It looks different at every stage as it changes. Focus Skills: h, b, f, ff, l, ll, s