Description I Am Izza . Izza is not a dog, an ox, or a bee. What is Izza? Chuck Is on a Quest . Chuck is on a quest. Can he get past the things in his path to get to the dragon's den? The phonemes /zz/qu/ are featured in this title. In Level 3 - Yellow books, children build on the letter-sound combinations learned in levels 1 and 2. They learn consonant digraphs (sounds made up of two letters together such as 'ch' or "ll") and long vowel sounds (such as 'igh' or 'ai').