“…That assertion has since been supported by various research findings over several decades. In fact, it is now well-established among cognitive and educational psychologists that low-stakes practice testing, or retrieval practice, can serve as a more potent "memory modifier" than non-retrieval studying (Bjork, 1975), yielding pedagogical benefits in classroom settings (e.g., Agarwal et al, 2014;Pan, Cooke, et al, 2019) and across a wide range of materials (i.e., the testing effect; for reviews, see Pan & Rickard, 2018;Roediger & Karpicke, 2006b;Rowland, 2014), including spelling (e.g., Beseler, 1953;Christine & Hollingsworth, 1966;Cook, 1957;Cohen, 1969;Jones et al, 2016;Louis, 1950;Pan et al, 2015;Schoephoerster, 1962). Thus, in recommending practice testing, the Speller incorporated a second learning technique that is now widely regarded as highly potent (Dunlosky et al, 2013;Pashler et al, 2007).…”