This MFA thesis document investigates the experience of teachers participating in a trainer of trainers (TOT) professional development model in drama-based instruction in K-12 schools. This document explores a two-phase research study in which teachers attended an Advanced Summer Institute and then took on the role of teacher trainer in their school context. The mixed-methods study uses narrative thematic analysis of interview data as well as quantitative scales to describe the experiences of the drama-based instruction teacher trainers. Throughout, this document argues for more effective, sustainable professional development practices that draw on the instructional knowledge of teachers. The findings suggest organizational support largely determines the amount of participation of teacher trainers in their school context. The document concludes with a discussion of how to better support teachers as teacher trainers on their campuses as part of a larger effort to build capacity and sustain ongoing drama-based instructional practice in K-12th grade schools. / text