Searchable ASCD Collection: BOCES Instructional Support Services is provides this collection of the best books from ASCD's collection for your use.
DARE TO DIFFERENTIATE: The Dare to Differentiate Wiki has an excellent collection of resources for organizing flexible groups and helping students become more independent within them.
RTI Resources:
Intervention Central: Newly posted academic and behavioral intervention strategies, download publications on effective teaching practices, and use tools that streamline classroom assessment and intervention.
What Works Clearinghouse: Practice guides provide practical recommendations for educators to help them address the everyday challenges they face in their classrooms and schools.