Measuring Implementation of Multi-Tiered Systems of Support (MTSS): Development and Validation of the Integrated MTSS Fidelity Rubric (IMFR) - Allison Gruner Gandhi; Erica Lembke; Jennifer Pierce; Heather Smith; Andrew Swanlund; Julia Casasanto-Ferro; Caitlyn E. Majeika; Timothy C. Riley-Tillman (Assessment for Effective Intervention, 2026)