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๐ Why Kids Forget Maths Tricks (and the 7-14-30 Day Fix)
Your child mastered a trick on Monday and has no idea how to do it two weeks later. This is normal: the brain lets go of anything it does not use. The fix is not more practice, but practice at the right times.
The forgetting curve
In the 1880s the psychologist Hermann Ebbinghaus measured how quickly we forget new material. Memory drops steeply in the first few days, then levels off. Each time we successfully recall something, the drop afterwards is slower. Many studies since have confirmed this.
Recall beats re-reading
Looking at a worked example again feels like revision, but it does little. What strengthens memory is answering a question from memory, even if the child struggles a bit. Researchers call this retrieval practice.
The 7-14-30 day plan
- The day a skill is learned: practise until it is correct.
- After 7 days: a few quick questions.
- After 14 more days: a few more.
- After 30 days: one more check, then every couple of months.
If the child gets it wrong at any point, go back to a short review the next day. Each review takes only a few minutes, because it is a handful of questions, not a lesson.
Mix old and new
A mixed set of questions (some tables, some fractions, some word problems) is harder than a page of one type, but it teaches children to recognise which method a question needs. That is exactly what exams test.
Make it automatic
Keeping track of what is due when is the hard part for busy families. The BeadBop app does it for you: every trick your child masters comes back for a quick review after 7, 14, 30 and 60 days, and a mixed check-up every four weeks covers everything learned so far.
Quick answers
Why does my child forget maths they learned?
Memory fades quickly unless it is used. Each time a child successfully recalls a skill, it fades more slowly afterwards, so a few well-timed reviews prevent most forgetting.
How often should children revise maths?
A good rule is a quick review 7 days after learning, again after 14 more days, then after 30. Each review only needs a few questions.
Is it better to practise one topic or mixed topics?
Mixed practice feels harder but works better, because children learn to recognise which method each question needs, as they must in an exam.