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Frequent, low-stakes quizzes help boost memory. In a , students who simply reread material for an upcoming exam scored 50 percent, on average. But students who took practice tests did much better—scoring 66 percent on the exam.

shows that when students rely exclusively on reviewing or rereading the material, they can develop a false impression that they understand the topic. Practice tests help close the gap between what students know and what they think they know.

To get the most out of practice tests, make them low-stakes, which can help decrease . Timing also matters: It’s helpful to give a practice test and continue to give them . Since students may not realize what questions they got wrong—or why—be sure to give . Finally, simple prep strategies (such as ) can dramatically improve a student’s performance.