Spacing Retrieval is More Important than Extra Retrieval — from learningscientists.org by Cindy Nebel
Excerpt:
Educators: Quiz your students. Absolutely you should incorporate retrieval practice. Just space it out over time instead of providing blocked weekly quizzes just over that week’s content. But congratulations! You don’t have to do the extra work of writing and grading more quiz questions to get this benefit!
Students: Quiz yourselves and when you do, make sure you’re reviewing old material. Build in frequent study sessions, but you don’t have to double the time you’re spending studying to get great benefits, as long as you’re doing what you should be doing throughout (spaced retrieval).
Speaking of memory, also see: