We present a multiple case study wherein one institution established new communities of practice supporting graduate student instructors teaching coordinated courses in the presence of minimal existing resources and funding. This was accomplished by partnering with and adapting resources from another institution; one with a well-established community-driven curriculum structure. In particular, we detail a potential model for similarly seeding a new community of practice by describing amounts of time and attention for adapting curriculum materials. We also detail how a professional learning community approach can be leveraged to build curriculum structures that can sustain an equitable community among instructors.