Organization: RTI Action Network
This article from the RTI Action Network discusses the RTI component of scientifically based instructions for all students–Tier 1. It also provides information on selecting a Tier 1 core program in reading, and addresses the issue of selecting core programs in other subjects of writing, mathematics, science, and social studies.
http://www.rtinetwork.org/learn/research/selectingcorecurriculum-tier1