Taking Citizen Science to School (TCSS) is a network of design-centric research-practice partnerships (DC-RPP) intended to promote incorporation of citizen science into science classrooms. This study explores the nature of shared knowledge developed by participants as part of a workshop intended to increase cross-fertilization among participants. Interaction mechanisms included storytelling and abstraction of cross-project insights, using a tool designed to share design knowledge. Seventeen unique emergent design-principles were found to correspond with well-established STEM education design-principles, but also with new notions of learning through citizen science. This illustrates that the TCSS community is beginning to shift from functioning as a network of DC-RPPs into a learning multi-expertise community that seeks to steward the domain of knowledge on school-based citizen science.