Based on the best research on how children develop reading skills, these twelve books introduce a carefully selected progression of letter sounds-starting with the easiest and most common. Each book helps build a young reader's confidence with repeated examples of the letter sounds being focused on, as well as "words to learn" and "words to sound out." Introducing the first Scooby-Doo phonics box set! Based on the best research on how children develop reading skills, these twelve books introduce a carefully selected progression of letter sounds-starting with the easiest and most common. Each book helps build a young reader's confidence with repeated examples of the letter sounds being focused on, as well as "words to learn" and "words to sound out.