Ideal for centers and cooperative learning, the CenterSOLUTIONS(R) Language Arts Windows set contains 5 two-sided write-on/wipe-away cards measuring 8.5" x 11" each. The cards are 3-hole punched for binder storage, have large windows for easy writing, and are self-checking. This set reviews short and long vowel phonograms, vowel digraphs, diphthongs, r-controlled vowels, and a mixed review.