This summer session will provide an introduction to multi-tiered systems of support (MTSS) as the framework for implementing the science of reading in elementary schools. A clear description of MTSS will be contrasted with the current service delivery models it is designed to replace. Participants will have an opportunity to reflect on the components of MTSS in relationship to current practices in their schools. Several examples, tools, and success stories will be shared from schools that have improved their reading outcomes.