This Practice Guide, released by the Institute of Education Sciences (IES) in April 2009, aims to help educators develop and implement Response to Intervention (RTI) to assist students struggling in math. The focus is building an instructional program in order to improve outcomes for students who have difficulty with math. The guide presents recommendations about screening, instruction, and progress monitoring and indicates the quality of the research base that supports them. It includes common questions and potential concerns that might arise with each recommendation and suggestions to help alleviate those concerns. Technical details about the studies that were used to generate the recommendations are also presented.