This article reports on a project investigating the impact of a new framework for Readers Theatre on teachers' professional skills. Twenty-one Islamic secondary English school teachers engaged in collaborative professional development training to experience and give feedback on the framework. The article describes the participants' affective and critical responses and perspectives as well as opportunities and challenges related to the new framework in infusing peace values into EFL (English as a Foreign Language) materials. This study provides fresh insight into the potential of Readers Theatre for teaching peace and conflict prevention in the Indonesian Islamic EFL secondary school context.