Two studies of
Let’s Begin with the Letter People® meet What Works Clearinghouse (WWC) evidence standards and no studies
meet WWC evidence standards with reservations. The two studies include children in 49 classrooms in 25 preschools in Houston, Texas, and southeastern New York State.
Based on these two studies, the WWC considers the extent of evidence for Let’s Begin with the Letter People® to be medium to large for oral language and print knowledge and small for phonological processing and math. No studies that meet WWC evidence standards with or without reservations examined the effectiveness of Let’s Begin with the Letter People® in the early reading and writing or cognition domains.