A university was awarded a "Teacher Prep to Practice" grant from the Pennsylvania Department of Education for a project titled "Developing Culturally-Relevant Aspiring Teachers." The university collaborated with local school districts to host 2, 3-day "summer institute" professional development sessions, focusing on culturally relevant education, positive behavior support, trauma-informed practices, and effective coaching for novice teachers. The intention was to build a cohort of trained, veteran teachers equipped to serve as mentors for pre-service and early career educators. This paper provides an overview of the summer institute and shares the results of a related mixed-methods research study.