for The Penguin Problem by Abby Klein and John McKinley
With more than 3.2 million copies sold across all channels, READY, FREDDY! is a huge success with first-grade readers! Freddy's first-grade class is learning all about penguins -- including the fact that some species are endangered. When Freddy suggests a penny drive to help save the penguins, everyone loves the idea. But Freddy can't find his penny jar! How will he save the penguins now?
Publisher description retrieved from Google Books.