Figure.

Knowledge Acquisition and Retention in Standard Versus Flipped Classroom Groups^a

^a Group mean scores on knowledge assessment test at baseline (preintervention, summer 2015), immediately after the curriculum (postintervention, fall 2015), and several months later for both cohorts (flipped classroom and standard curriculum delivery, spring 2016). The change in scores between baseline and immediately after the curriculum represents knowledge acquisition and is significantly better using a flipped classroom. The change in scores from immediately after the intervention until the spring represents knowledge retention and is significantly better using a flipped classroom.