“They forget everything by next week”

The lesson went well because everything students needed was in front of them: your explanation minutes old, the worked example on the board, the steps fresh in their heads. That feels like knowing it, to them and to you. But memory holds on to what gets used, and after the lesson the material is rarely used again. It gets taught, practised while fresh, ticked off, and buried under a week of new content. Nobody learned it badly. Forgetting at this speed is what any brain does with knowledge it is never asked to bring back.

The pattern holds because on the day everything looks fine. Students can do the work, the books fill up, and the lesson feels successful. The forgetting surfaces weeks later, usually in a test, when the moment to fix it has passed. Revisiting old material feels like time taken from a full curriculum, so the plan rolls forward. The techniques below push back in two broad ways: some build recall into ordinary lessons, so students practise pulling knowledge back from memory, and some plan when each topic returns, so it comes back before it has faded.