Robert J. MarzanoTeaching Basic, Advanced, and Academic Vocabulary: A Comprehensive Framework for Elementary Instruction (Carefully curated clusters of tiered vocabulary for K-5 language and literacy development)

The book has been great so far. I'm five chapters in and have found that the reasoning, examples, and activities are state-of-the-art and classroom ready. This book would be a help to any teacher who really wants to dig deep in vocabulary instruction.

Marzano never taught. He uses his own cherry picked research. More than 43% of teachers that quit teaching in their first 3 years say it was because of the Marzano crap their school district was using!