Best curriculum for struggling math learners. The shape and color help your brain remember and categorize it faster, which is the struggle with language delays. In this lesson. Fun, self-checking lesson and interactive. We add 1 to each block, giving the students an equation. They have three blocks to choose from, then drag the correct answer into the black box. Kids with Autism, Down Syndrome, Language Delays- expressive and receptive delays, ELL, EFL, ESL.