Freddie and Flossie are twins. Snap is their dog. They like to play catch together -- until Snap decides it's time to play chase Ready-to-read books offer children a world of possibilities at four different reading levels: Recognizing Words Word repetition Familiar words and phrases Simple sentencesStarting to Read Simple stories Increased vocabulary Longer sentencesReading Independently More complex stories Varied sentence structure Paragraphs and short chaptersReading Proficiently Rich vocabulary More challenging stories Longer chapters