School-wide positive behavioral interventions and supports (SWPBIS) is an example of a framework for implementing school-based practices with fidelity and durability. Critical features of SWPBIS include: (a) teaming; (b) data-based decision making; and (c) using systems for supporting staff in implementation. These features of SWPBIS allow specific practices within the framework to be implemented more fully and sustainably. The purpose of this evaluation brief is to assess whether schools implementing SWPBIS with adequate fidelity of implementation were more likely to sustain specific school practices, such as Playworks, than schools not implementing SWPBIS with fidelity. For the purposes of this brief, fidelity of SWPBIS is the extent to which its critical features are implemented and whether the critical features are implemented at a level meeting established criteria--criteria which have been shown to produce the desired results associated with that practice. The following question was addressed: To what extent does implementing SWPBIS with fidelity increase the likelihood Playworks will be sustained? The results indicate new practices are more likely to be sustained over time when implemented within an existing implementation framework like SWPBIS. Schools included in the evaluation brief were more than three times more likely to sustain the Playworks Coach program if they were implementing SWPBIS with fidelity.