National Geographic Primary Readers is a high-interest series of beginning reading books that have been developed in consultation with education experts. The books pair magnificent National Geographic photographs with lively text by skilled children’s book authors across four reading levels.From woolly mammoths to saber-toothed cats, prehistoric mammals once roamed Earth. With beautiful and engaging illustrations, authentic photos, and accessible text, kids will learn all about these mighty mammals in this level 3 reader.Level 3: Becoming independentBest suited to kids who are ready for complex sentences and more challenging vocabulary, but still draw on occasional support from adults. They are ideal for readers of Purple and Gold books.