MTSS is distinctly different from RTI/I and PBIS because...

It provides high quality core instruction.

It's a three tiered model of supports and services.

It includes universal screening for all students.

it is comprehensive of both academics and behavior.

All of the above reasons are correct. MTSS (Multi-Tiered System of Supports) is distinctly different from RTI (Response to Intervention) and PBIS (Positive Behavioral Interventions and Supports) because it combines all of these elements. MTSS includes high-quality core instruction, a three-tiered model of supports and services, universal screening for all students, and a comprehensive approach that addresses both academics and behavior. This comprehensive nature makes MTSS a more holistic and inclusive framework for supporting all students.