In 2004 the Individuals with Disabilities Education Act authorized funding for Response to Intervention (RtI) instruction in the United States. By 2011, 71 percent of school districts had adopted RtI (Institute of Education Sciences 2011). The goal of RtI is to provide personalized, just-in-time intervention in reading and math for students who are in danger of falling behind their peers. Teachers and librarians in RtI schools use data to determine student needs and evidence-based practice to improve student achievement (Missouri Department of Elementary and Secondary Education 2013). Because RtI focuses on making every student a successful reader, it aligns well with the goals of school librarians. To do the planning necessary to implement RtI, librarians and others have to plan the planning. This article provides an overview of the steps required in the planning process. These include planning interventions, planning with school librarians, and planning for success. The article also demonstrates the valuable role the school librarian plays in this process. School librarians contribute their expertise by training teachers to master technology and to collect and use data for assessment and decision making; librarians also offer research-based strategies for interventions. They provide interventions for large groups, individual students, and all group sizes in between. They use information and literature to enrich curriculum during RtI activities. Their skills contribute much to collaborative planning. Best of all, through RtI librarians have another way to contribute to student success.