Repetition done right revisits an idea across time and in different forms. Repeating the same sentence five times in one breath is not repetition. It is a loop, and learners stop hearing it.
Memory likes to be pulled, not pushed. Each time a learner retrieves something after a gap, the trace gets a little stronger. Repeating it for them removes the very effort that builds the memory.
Bring an idea back after a delay, when it has started to fade. The slight difficulty of recalling it at that point is what makes it stick. Too soon and there is no effort. Too late and it is gone.
A rough rhythm works for most lessons. Revisit within the session, again the next day, and once more a week later. You do not need a perfect schedule. You need gaps that are real.
The same idea in the same shape becomes background noise. Say it once, show it once, then ask learners to use it in a new problem. The idea stays constant while the surface changes, which is what makes it transferable.
Repetition that never asks anything of the learner is just noise with a rhythm.
More repetition is not always better. Once learners can retrieve it easily and use it in a fresh context, extra drills waste time that the next idea needs. Watch for fluency, then move on.
The signal is speed and confidence without a prompt. When that appears, the idea has moved from fragile to available, and you can safely spend your repetitions somewhere else.
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