Explode The Code provides a sequential, systematic approach to phonics in which students blend sounds to build vocabulary and read words, phrases, sentences, and stories. Frequent review of previously learned concepts helps increase retention. Each workbook in this series contains exercises that incorporate reading, writing, matching and copying. The consistent format of the books helps facilitate independent work. Explode The Code Book 1 introduces students to the sounds of short vowels. The exercises begin with short a and then follow with short i, short u, short e, and short o. Students practice blending sounds to read and write CVC words. In addition, several review lessons are included. Grades 1-3.