Response to Intervention (RTI) is a relatively new system for assessment and instruction that has promising potential for teaching mathematics. This book presents a discussion about RTI in mathematics and offers guidelines for teachers responsible for the planning, designing, and delivering of mathematics instructional programmes that reach all students. Each chapter begins with a brief description of how RTI can be implemented in various areas of maths and presents multiple examples of RTI procedures that are illustrated by various case studies. Guidelines in each chapter address common concerns and provide suggestions for multiple interventions related to the specific maths areas. The authors explain the need for effective interventions and include: the types of interventions that are appropriate within an RTI system for mathematics; intervention examples in the context of small group instruction; and a call for increased research.