View Spread How Do Birds Fly? A basic explanation of the scientific principles behind bird flight. Includes instructions for a related activity. RL Grades 3 IL Grades 3-5 Details: Product type: Paperback Book ISBN: 978-0-7614-3362-0 Author: Melissa Stewart Copyright: 2008 Reading Level: Grade 3 Interest Level: Grades 3-5 Paperback Book — $9.23 / $7.85