Mind & EverydayFact
Same study time, twice the retention.
Spread 60 minutes of studying over several days instead of one evening and you'll remember far more. Hermann Ebbinghaus described this spacing effect back in 1885, and it's one of the most replicated findings in learning research. The gap forces your brain to retrieve the information again, and that retrieval is what makes it stick.
Useful: Three 20-minute sessions on three days beat one hour in a row.
Source: en.wikipedia.org