According to the Every Student Succeeds Act (ESSA, 2015), a multi-tiered system of support (MTSS) is “a comprehensive continuum of evidence-based, systemic practices to support a rapid response to students’ needs, with regular observation to facilitate data-based instructional decision making.’’ These systematic practices provide an educational framework that helps schools provide timely and targeted academic, behavioral and social-emotional support to students. It is a data-informed approach that uses screening, progress monitoring, and evidence-based interventions to ensure that all diverse learners receive the necessary supports to meet their needs. The Arlington Central School District (ACSD) recognizes the importance of MTSS in promoting student success and providing a safe and inclusive learning environment that recognizes and respects the languages and cultures of all students.