Read fluently with the Smithsonian! For fluent readers that have mastered levels 1, 2, and 3, Smithsonian Readers: Endless Explorations Level 4 provides fascinating facts and challenging content that promotes reading success and enjoyment. Developed in collaboration with the Smithsonian Institution and esteemed childhood literacy expert Dr. Adria Klein, Smithsonian Readers: Endless Explorations Level 4 contains six 32-page topics for children on their way to becoming expert readers: Predators, Space Exploration, Natural Disasters, World Wonders, Ocean Habitats, and Flight. Bound into the book are 36 perforated fact cards created for fluent readers looking for extra learning opportunities. Level 4: Fluent Readers -Variety of factual texts that contain unfamiliar themes and challenging technical content -Includes glossary and pronunciation guides to -Contains longer and more complex sentence patterns -Most of the vocabulary should be familiar to second-graders -Longer stretches of text and extended descriptions without the support of pictures -Extended sentences with various structures