More frequent use of properly spaced reviews and tests can dramatically improve classroom learning and retention. Research suggests that spaced repetitions can foster time-on-task, help students develop and sustain positive attitudes toward school and learning, and encourage highly constructive thinking and deeper understanding of the topic. (57…

This article reviews research on the spacing effect (SE): the tendency, given an amount of study time, for spaced presentations of a unit of information to yield much better learning than massed presentations. SE's current status in the classroom and its implications for teacher education are discussed. (IAH)