Did you know that orcas are the largest kind of dolphin? Orcas also use sound to help them catch their food.Find out these and more exciting facts in I Am an Orca.Orca is part of the Let's Read collection of media enhanced books designed for children ages 5 to 7. These bookswere created to inspire beginning readers to become independent readers. Educator and reading expert Dr. Edward Fry created a list of 1,000 instant sight words. These 1,000 sight words must be learned by students in elementary grades. By the third grade, students are expected to instantly recognize the first 300 of these words. The Let's Read books combine these 300 sight words with vivid color photography and nonfictioncontent within a kindergarten to second grade curriculum framework.