Once a response-to-intervention (RTI) framework is in place, how can educators determine whether or not interventions are working? This volume focuses on the "response" component of RTI, providing crucial knowledge and hands-on techniques for assessing the effectiveness of RTI practices in grades K-12. The authors show how to select suitable assessment measures, analyze data about academic and behavioral interventions, and make defensible decisions about groups, individual students, and special education eligibility. Professional development strategies are also addressed. Useful reproducible tools are included; the large-size format and lay-flat binding facilitate photocopying. Purchasers also get access to a Web page where they can download and print the reproducible materials. This book is in the Guilford Practical Interventions in the Schools Series, edited by T. Chris Riley-Tillman. See also RTI Applications, Volume 1: Academic and Behavioral Interventions, which covers how to select appropriate interventions and implement them with integrity.