A three year federally-funded project to investigate and develop facilitation practices for informal learning in STEM areas. Working with partners at a science center in the Southeastern U.S., our university-based team developed and tested a “facilitation toolkit” for museum staff charged with leading online activities and discussions to foster public engagement and learning about science. We subsequently developed an interactive version of the toolkit- a web-based application that performs rhetorical analysis and visualizes results on the fly - as an assistive resource for training facilitators and aiding decision-making during facilitation sessions.