Spaced vs Mass Practice

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"Retention is improved when exposure to information is repeated and spaced over time. In this strategy, we create opportunities for students to revisit older content in deliberate and purposeful ways to promote not just recall of that content, but also sustained comprehension of it. The more complex the practice is, the more space you should put between it and the next practice. By using spaced practice in the station rotation model, you can mix it in with mass practice of new content in the same lesson plan." Bold School, Kieschnick, p. 184