As adoption of the RTI model grows, educators and administrators are eager to find resources that describe the theory behind it and provide useful guidelines for its effective implementation. Packaged in the user-friendly Essentials series format, and authored by two RTI experts, Essentials of Response to Intervention provides just that resource. This useful guide provides a concise overview of the essential features of RTI, instruction for its implementation, and post-implementation guidelines for assessing whether the program has been effective.