Implementation of multi-tiered system of supports (MTSS) requires appropriate school infrastructure and support mechanisms. By ensuring the proper infrastructure and supports, schools can ensure they have the knowledge, resources, and organizational structures to being MTSS implementation, implement MTSS with fidelity, and sustain MTSS implementation. This resource summarizes the infrastructure and support mechanisms outlined in Section 5 of the MTSS Fidelity of Implementation Rubric as necessary for successful MTSS implementation.