“…That is, through learning by teaching, individuals theoretically learn content more deeply by teaching it to others compared with learning the content just for oneself. However, the reasons for this positive effect on learning remain unclear (Fiorella & Mayer, 2013;Galbraith & Winterbottom, 2011;Peets et al, 2009;Rohrbeck, GinsburgBlock, Fantuzzo, & Miller, 2003;Roscoe & Chi, 2007), and some research has shown no positive effects (Renkl, 1995) or negative effects (Ehly, Keith, & Bratton, 1987) on learning. In their seminal article, Bargh and Schul (1980) proposed that the expectation of teaching content to others results in a change in the way individuals study that material compared with normal studying for oneself.…”