Interleaved Retrieval Practice

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Practice that’s spaced out, interleaved with other learning, and varied produces better mastery, longer retention, and more versatility. The learning from interleaved practice feels slower than learning from massed practice. Teachers and students sense the difference. They can see that their grasp of each element is coming more slowly, and the compensating long-term advantage is

Spaced Retrieval Practice

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When retrieval practice is spaced, allowing some forgetting to occur between tests, it leads to stronger long-term retention than when it is massed. The advantage of spaced practice was first observed by Ebbinghaus in 1885 and no study has ever been able to refute it. Delaying subsequent retrieval practice is more potent for reinforcing retention