Perfect Pairs , which marries fiction and nonfiction picture books focused on life science, helps educators think about and teach life science in a whole new way. Each of the twenty-two lessons in this book is built around a pair of books that introduces a critical life science concept and guides students through an inquiry-based investigative process to explore that idea. Each lesson starts with a "Wonder Statement" and comprises three stages: "Engaging Students," "Exploring with Students," and "Encouraging Students to Draw Conclusions." Bringing high-quality science-themed picture books into the classroom engages a broad range of students, addresses the Performance Expectations outlined in the Next Generation Science Standards, and supports the goals of the Common Core State Standards for English Language Arts.