This document summarizes Elaine Huber's preliminary findings from a review of the literature on flipping the STEM classroom. It provides an overview of the current literature, aims of the review, methodology, findings organized by themes, and next steps. The main findings are that studies generally report positive perceptions of achievement, engagement, and self-efficacy, though some note increased workload or lack of preparation. Gaps in the literature are also identified, such as a lack of non-US based studies, longitudinal studies, and a design framework for flipping STEM courses.