In 2018, Code.org began developing an update to their AP CSP curriculum in order to address teacher feedback and align to the College Board’s 2020 CSP Conceptual Framework. During this process, we researched best programming practices and developed our own model for introducing concepts: Explore, Investigate, Practice, Make (EIPM). These lessons have now been published and are being used by the community! Come learn about the mental models we designed for the Explore lessons, where students interact with manipulatives to...