Supplementary Collection. A step-by-step, book-by-book program that guides children through the early stages of reading. Each book, carefully evaluated by a reading specialist to correlate with the Guided Reading Levels, is leveled to address the early stages of a child's reading development. Inside each box set you'll find 75 storybooks (5 copies of 15 titles) on topics children love, which makes them perfect for group learning. Each set also includes a mini-teaching guide. Includes: 75, 8-page books (5 copies of 15 titles); 4-page mini teaching guide; Storage box.