Digraph bingo provides practice for words starting with SH, TH, WH, AND CH. It is the perfect activity for whole group, centers, and partner practice. This bingo game contains 30 unique game boards and three sets of differentiated calling cards (picture only, picture and word, and word only). Take your centers and RTI to the next level! Black and white pages to save ink. Want to add a splash of color? Copy on colored paper!