Our Cluster Tiles represent 78 of the most important letter groupings children need to recognize in reading and spelling. There are blends (bl, cr, str, etc.), digraphs (th, wh, ch, sh), vowel pairs such as ou and ai, rimes (ake, an, at, etc.), and word endings (ed, ing, est, er, etc.). Research shows that thinking of these common chunks as one unit rather than as individual sounds helps children move quickly to fluent reading and accurate spelling. These easy-to-use tiles are guaranteed to help students build words and grasp important phonics patterns. Includes 19 blends, 4 digraphs, and 12 vowel pairs, each 1 1/4" by 1 1/4". Plus 5 word endings and 38 rimes, each 1 1/4" by 2." 78 tiles in handy ziplock bag.