Is MTSS Merely a PBIS and ABA Delivery System?

MTSS or Multi-tiered systems of support claims to be based on scientific research and use only evidence-based practices. MTSS originated in the swamps of Special Ed World. PBIS (positive behavioral interventions and supports) and ABA (applied behavioral analysis) are used with MTSS to make some behaviors disappear and others appeart. Magic. Claims are made that these are “evidence-based”.