You've probably heard the alarming statistic that kids lose two months of math skills every summer. The truth is more nuanced — but math skills do erode without practice, and the kids who do nothing all summer really do start the next grade behind.

Here's what the research actually shows, and what you can do about it without making summer feel like school.

What summer learning loss actually is

The "summer slide" research suggests kids lose, on average, about a month of grade-equivalent skills in math over a 10-week summer break. Math loss tends to be larger than reading loss, because reading happens passively (kids see signs, books, screens) while math doesn't show up as much in everyday life.

But "average" hides a wide range. Kids who do zero math practice over summer can lose up to 2.6 months of skills. Kids who do even minimal practice — 10 minutes a few times a week — typically come back roughly where they left off.

So the question isn't "should we do summer math?" The question is "how much, and what kind?"

The 60/30/10 rule

A realistic goal for summer math is what I'll call the 60/30/10 rule:

60% of the time, do nothing math-related at all. Summer is summer.
30% of the time, do passive math — counting, estimating, calculating in everyday life
10% of the time, do focused practice — 10-15 minutes of structured problems

That 10% works out to about 15 minutes a day, four or five days a week. Less than two hours a week of actual sit-down math is enough to prevent the slide.

Focus on retention, not new learning

Summer is for keeping what they already learned, not for getting ahead. The practice should feel mostly familiar — review of skills they covered in the just-ended school year. If your kid is running into "I don't know how to do this" problems regularly, the difficulty is too high.

For summer, use slightly easier than the latest grade level. Going into 4th grade? Use 3rd grade material. Going into 7th? Use 6th. The point is reinforcement, not pushing forward.

What to actually focus on by grade

Going into 2nd grade: Addition and subtraction within 20. Counting to 100. Try our grade 1 topic pages.

Going into 3rd grade: Two-digit addition and subtraction. Telling time. Beginning multiplication concepts. The free time telling practice is a good summer fit.

Going into 4th grade: Multiplication facts 0-12. This is the highest-leverage summer focus for any kid going into 4th. Use our multiplication facts speed test.

Going into 5th grade: Multi-digit multiplication and division. Equivalent fractions. The multi-digit multiplication practice is exactly right.

Going into 6th grade: Fractions and decimals. The adding fractions unlike denominators worksheet and compare decimals practice hit the highest-value skills.

Going into 7th-8th grade: Integers, percentages, simple equations. The adding integers practice and simple equations practice are good daily reps.

For more grade-by-grade detail, see our summer math practice for kids post.

How to structure the day

Pick a 15-minute window that's reliable. After breakfast tends to work best — kids' attention is fresh, and getting it done early frees the rest of the day to feel like summer.

A simple weekly rhythm:

Monday: online practice (something at grade level)
Tuesday: worksheet (something focused on a single skill)
Wednesday: game or real-world math
Thursday: speed drill (multiplication or addition)
Friday: mixed review or kids' choice

Saturday and Sunday off. This is summer.

What about screen time?

Online math practice is genuinely useful and saves you the printer ink. But limit it to one of the five practice days, not all five. Pencil-and-paper math activates different neural pathways and reinforces the same skills in a complementary way. A kid who only practices math on a tablet learns to associate math with screens, which doesn't transfer well to school tests.

How to track progress

A simple chart on the fridge, with a sticker for every day they practice, beats the most sophisticated learning app for motivation. Kids check it daily. They protect their streaks. And at the end of summer, they have a visible record of having shown up.

What to expect

If you do this consistently, your child won't just avoid summer slide — they'll start the year slightly ahead of classmates who took the summer off. That head start compounds: confidence in September leads to engagement in October leads to better grades in November.

The investment is tiny. The compounding return over years of schooling is enormous. Two hours a week, eight to ten weeks. That's all summer math really needs to be.

How to Prevent Summer Learning Loss in Math: A Realistic Plan