Where the Sidewalk Ends is one of my favorite P anthologies of all time. As a child I would spend hours reading over each of his fun poems. This could be a useful book to use for RT or AS. The poems in this book will bring a smile to children of all ages.
https://www.rif.org/literacy-central/book/where-sidewalk-ends
This is a great website with different resources to bring into your classroom when covering this text.