Fig. 1
From: Iterative design of a simulation-based module for teaching evolution by natural selection
Screenshot of Darwinian Snails workbook (a) and tutorial (b) versions. Students play crab by clicking on snails to eat them, and can use checkboxes to enable and disable conditions that contribute to natural selection (variation, heritability, differential survival/reproduction). The simulation interfaces are very similar in both versions, but the tutorial version compresses the simulation in order to make room onscreen for instructions and questions