This beginners phonics leveled activity book features a particular phonetic sound with its different spellings.  The three stories in each book rhyme, and the phonetic sound being taught is underlined.  The Crocodile Ride features the long vowel sounds: i-e, ie, u-e, oo, ew, ou, a-e, ay, and ai.  Parent notes at the back of the book explain how to use the rhymes to develop reading skills.