The Cluster Grouping Handbook: A Schoolwide Model: How to Challenge Gifted Students and Improve Achievement for All by Susan Winebrenner, Dina Brulles (2008) Paperback
This wasn't quite for classroom teachers, but maybe for a committee deciding how to implement SCGM in a district. There are some practical resources in this text, but it seems more useful for leaders to read this and disseminate those resources, instead of classroom teachers using this text directly in their classrooms.
Finally finished this. The publication date aligns with the “nothing new” feeling I had while reading. In fact, many of the ideas are outdated. Wish there was something more current on the school wide cluster model that was suggested reading from our school district.