This study employed mixed methods to investigate the efficacy of scaffolding self-regulated learning prompts within a whole-body educational game, "Waves." This game was designed to teach middle school-aged children basic concepts of waves by moving their bodies to mimic the motions of waves, physically experiencing different velocities and wavelengths. Textual prompts intended to scaffold self-regulated learning behaviors respond to learner actions (or non-actions) within "Waves." The adult facilitator reinforced the in-game prompts by speaking them aloud. This study is framed around the research questions: (1) How does a whole-body educational game effectively teach players about STEM concepts? (2) How can self-regulated learning be effectively scaffolded in a whole-body educational game? and (3) Are self-regulated learning scaffolds utilized the same way by all players? A quantitative pre-post assessment of learning and self-regulation skills was further elucidated by a case study analyzing the recorded discourse of two partners while participating in the larger study.