This article describes how a purposeful sample of 62 elementary schools from 17 states implemented a Response to Intervention (RtI) framework for reading. School informants answered surveys and were interviewed about differentiated instruction in Tier 1, screening/benchmarking, where Tier 2 interventions were located, typical group size and the minutes/day of intervention in Tiers 2 and 3 groups, and how students with individualized educational programs (IEPs) in reading were served in the school's RtI model. Schools reported using differentiated instruction in Tier 1, favored curriculum-based measures for screening/benchmarking and progress monitoring, reported more intensive interventions and more progress monitoring in Tier 3, and used a wide variety of models for serving students with IEPs within the schools' RtI models. (Contains 3 tables and 5 figures.)