A multi-tiered system of supports (MTSS) is a framework for providing appropriate instruction and intervention for all students in a school system. Schools implementing MTSS utilize a problem-solving process to address problems at various levels including whole-school, grade- or department-level, classroom, or individual student problems. MTSS includes three levels, or tiers, of support that represent increasing intensity and individualization in the instruction and intervention provided. It is a framework that is used for behavior (known as positive behavior interventions and supports), social-emotional learning, attendance, academics, and other areas of practice.