Math

Why Kids Forget Math Over Summer (and a 10-Minute Daily Fix)

April 23, 2026 · 4 min read

Every fall, teachers spend the first 4 to 6 weeks re-teaching material from the previous year. The culprit is what researchers call "summer slide" — the loss of academic skills during the long break. And math is hit harder than reading.

The good news: preventing summer math loss does not require workbooks or tutoring. Ten minutes of daily math play is enough to keep the neural pathways active.

The Data

2.6

months of math skills lost by the average student each summer

6 wks

spent each fall re-teaching last year’s material

10 min

of daily practice is enough to prevent most summer regression

A 10-Minute Daily Plan

Play one math game. Card games like War (with addition or multiplication), dice games, or apps like 3 Jars take under 10 minutes and keep computation skills warm without feeling like homework.

Cook or bake together once a week. Measuring, doubling, halving, estimating time — a recipe is a math lesson dressed as dessert.

Use car time for mental math. "I see a speed limit sign that says 45. If we are going 30, how much faster could we legally go?" Quick, playful, and zero materials needed.

"We do not need to teach more during the summer. We need to stop the forgetting."

— Harris Cooper, Summer Learning and the Achievement Gap (2007)

Ten minutes a day, embedded in things your family already does. That is the entire prescription for preventing months of regression.

Keep math alive all summer

3 Jars Academy turns math practice into games where every correct answer builds toward family experiences, investing, and giving back.

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