Spaced Repetition
Also known as التكرار المتباعد
Definition
Spaced repetition schedules review of material at increasing intervals over time, prompting recall just as it begins to fade. It is one of the best-evidenced techniques in learning science: the same total study time distributed across sessions produces substantially better long-term retention than a single block.
Hermann Ebbinghaus described a forgetting curve in the 1880s from experiments on memorizing nonsense syllables: without review, recall of that material faded quickly. Workplace content is more meaningful than syllables, and people keep using some of it on the job, so the same curve does not apply as a universal fact. Even so, a one-off course with no later review is a weak way to hold knowledge that is used rarely.
Implementation is straightforward and rarely done. Short recall prompts delivered over the weeks after a course, ideally asking people to retrieve the answer instead of rereading it, help them retain what the course taught. This is also why microlearning works best as a reinforcement layer after a course.