Austin Buffum & Mike Mattos 
It’s About Time [Elementary] [EPUB ebook] 
Planning Interventions and Exrensions in Elementary School

Carve out effective intervention and extension time at all three tiers of the RTI pyramid. Explore more than a dozen examples of creative and flexible scheduling, and gain access to tools you can use immediately to overcome implementation challenges. These books are full of examples from real schools that have achieved these results without using additional resources or extending the school day.