How Much Math Kids Lose Over Summer + What to Do About It

Summer math loss has a paper trail going back decades, and the numbers are more specific than a general warning about screen time and missed worksheets.

Three major studies put real data behind what happens to math skills between June and September, which grade levels take the hardest hit, and why even capable students are not automatically protected.

Our education specialists at Mathnasium reviewed three studies to break down exactly what the data shows, which skills are most at risk, and what targeted practice over the summer may look like in practice.

What the Research Shows About Summer Math Loss

Summer math loss is a documented pattern across decades of research, and three major studies give parents the most specific picture of what it looks like.

• Harris Cooper, meta-analysis of 39 studies, 1996: A review of 39 studies found that achievement test scores decline over summer, with losses equivalent to about one month on a grade-level scale. Math losses were more significant than reading losses, and the effect was most detrimental for math computation and procedural skills. The explanation Cooper's team identified is that reading gets casual reinforcement through everyday life, while math practice has no equivalent outside of school. Fact-based and procedure-based skills fade faster than conceptual knowledge when structured practice stops.

• NWEA MAP Growth, 2025 norms: Students lose between two and seven RIT points in math over summer, depending on grade, which is equivalent to 10 to 30 percent of what students typically gain during the school year. Reading scores change by less than one RIT point on average across the same period. The skills NWEA identifies as most vulnerable are procedural skills, vocabulary, isolated facts, and multi-step tasks, exactly the skills that depend on regular practice to stay sharp.

• Megan Kuhfeld, NWEA research scientist, Kappan, 2019: Analyzing data from more than 3.4 million students across all 50 states, Kuhfeld found that the best predictor of summer math loss was how much a student gained during the school year. Students who made the biggest academic gains were the most likely to lose the most over the summer. Prior-year growth alone explained between 22 and 39 percent of the variation in summer learning patterns, depending on grade.

The Kuhfeld finding changes the conversation around summer math loss. The data shows that skill regression affects students across performance levels and points clearly to which math skills need reinforcement before September arrives. 

📕 You May Also Like: What Is the Summer Slide in Math? Understanding and Preventing Learning Loss

Why Math Fades Faster Than Other Subjects

Math fades faster than other subjects over summer because the skills it depends on require active, structured practice to stay intact.

Computation and procedural skills showed the steepest summer drops across subjects in the research, and the reason comes down to how we maintain those skills. Reading gets passive reinforcement through books, signs, conversations, and screens.

Students who read casually over the summer are still practicing reading without trying. Math has no casual equivalent outside of school, and the gap shows clearly in the NWEA data, where math drops by two to seven RIT points while reading stays essentially flat.

Two specific mechanisms explain why:

• Procedural skills are the step-by-step methods students use to work through a math problem from start to finish, like long division, solving a linear equation, or converting between fractions and decimals. These skills depend on repetition and sequencing. Procedural skills have no casual real-world equivalent, which is why they are the most exposed during summer.

• Working memory is the mental workspace students use to hold multiple steps in mind while solving a problem. Cognitive load research confirms that working memory capacity stays sharp through regular activation. Summer is the longest gap in that activation all year, and multi-step tasks are the first to feel it when students return in the fall.

Both mechanisms point to the same practical conclusion. Math skills need deliberate activation over summer, and the grade-level data shows where that activation matters most. 

📕 You May Also Like: How to Help Kids Build Math Stamina for Challenging Problems

Where the Data Shows Loss Is Steepest

Summer math loss does not hit every grade equally, and the NWEA MAP Growth 2025 norms show where the drops are largest.

The grade-by-grade picture from the NWEA data shows:

Three patterns stand out in the data:

• The fifth to sixth grade transition produces the largest single summer math drop at 7.3 RIT points, with Kuhfeld's research showing 84 percent of students losing ground during that summer alone

• Grades 2 through 5 show consistently steep drops, ranging from 5.1 to 6.4 points, meaning the foundational computation skills built in elementary school are the most exposed each summer

• Students at the bottom 10 percent for summer learning drop by the equivalent of more than a full year of typical school-year gains across most grade levels

The data also reinforces what Kuhfeld already found. Students who gained the most during the school year carry the highest risk of losing the most over summer. 

📕 You May Also Like: Must-Know Math Skills: Preparing for the Next Grade (K-12 Guide)

4 Strategies That Target the Skills Summer Learning Loss Affects Most 

We identified four strategies that help protect procedural fluency, working memory, and sequential problem-solving, the math skills research consistently shows are most vulnerable to summer learning loss. 

1. Talk Through Each Step Out Loud to Keep Procedures Active 

We should practice talking through each step out loud, because it is the most direct way to keep procedural skills from blurring between June and September.

As the Cooper meta-analysis established, computation and procedural skills are the most vulnerable to summer loss because they depend on active rehearsal to stay intact. Producing a correct answer is not the same as keeping the sequence accessible. Here are three specific ways to try at home:

• Pick one problem type your student worked on in spring, such as long division, fraction operations, or multi-step equations, and ask them to solve it out loud, step by step 

• Ask what comes next before they write each new step, so they retrieve the process actively instead of recognizing it passively 

• If a mistake appears, return only to the point where the sequence broke down instead of restarting the entire problem 

Consistent step-by-step practice keeps problem-solving sequences accessible over the summer and helps students hold onto procedural fluency across longer breaks from classroom instruction. 

📕 You May Also Like: How to Nurture Confident Math Thinkers, Not Just Answer-Getters

2. Use Short Math Sessions Consistently Throughout the Week  

Short sessions spaced across the week do more for procedural fluency than occasional long ones because working memory stays sharper through regular activation than through infrequent heavy use.

The cognitive load research we referenced earlier connects directly to this idea. Working memory capacity needs consistent activation to stay reliable. Ten focused minutes three times a week keeps those retrieval pathways active in a way that one long weekend session does not.

Here’s how we can apply this idea in practice:

• Set three fixed short sessions per week rather than leaving math practice open-ended, because open-ended practice rarely happens consistently over a full summer

• A mix of related problem types within each session helps students recognize what a problem is asking before they begin solving it. For example, a short fraction session might include addition, multiplication, and comparison problems instead of repeating the same format every time

• A session centered on one larger concept strengthens retention more effectively than rushing through many unrelated skills. Ten careful minutes focused on equations or multiplication patterns usually produce better long-term recall than a broad review completed quickly

📕 You May Also Like: How Often Should a Student Practice Math Each Week

3. Create Math Exposure Through Real Summer Moments 

Real summer moments give students casual math exposure that keeps procedural and computational skills active without replicating school.

Cooper's team pointed to the absence of that casual exposure as a core reason math fades faster than other subjects over summer. Here we offer a few practical ways to build that interaction into everyday routines. 

• Students playing strategy board games or card games that involve scoring or probability activate number sense and mental math through decision-making 

• Sports statistics create natural opportunities for math practice over the summer. We can track scores, calculate win percentages, or compare player averages, which applies data reasoning and computation to something your student already enjoys following

• A summer activity budget gives students a practical reason to compare prices, calculate totals, and use decimals, division, and proportional reasoning in a real decision

Casual math interaction during the summer does not need to look like formal instruction to be effective. Regular exposure through games, sports, budgeting, and everyday decisions helps students keep core computation and reasoning skills active between school years. 

📕 You May Also Like: How to Keep Your Child Engaged in Math as the School Year Winds Down

4. Identify Specific Skill Gaps Before the School Year Starts 

A clear picture of specific skill gaps gives students a targeted path back to grade level instead of a broad review that may miss the actual problem. 

Kuhfeld's findings point to a clear timing issue. Students who gained the most during the school year carry the highest risk of summer loss, which means fall is often too late to catch the gap before it affects the first weeks of class. 

Teachers typically spend the opening weeks reviewing prior material, but that review period is not designed to address individually specific gaps. At Mathnasium, we work with students through this window specifically, and we noticed two things that make the biggest difference:

• Targeted practice closes real skill gaps rather than reviewing broadly. The focus stays on the specific areas the data flags as most vulnerable: procedural fluency, multi-step sequencing, and grade-level computation 

• Summer support gives students time to consolidate skills without the pressure of new classroom content arriving at the same time

Students who strengthen foundational skills over the summer begin the new school year with greater confidence and fluency. 

📕 You May Also Like: How Summer Math Programs Help Keep Skills Sharp During Break

At Mathnasium, our tutors work through the how and the why of every step, so the problem-solving sequences your child built during the school year stay accessible through September.

How Mathnasium Helps Students Protect Math Skills Over Summer 

Mathnasium is a math-only learning center dedicated to helping K-12 students of all skill levels excel in math.

Students arrive over the summer with different mathematical starting points. Some need stronger procedural fluency before a new grade begins, while others need targeted reinforcement in computation or multi-step reasoning skills that still feel inconsistent after the school year ends. 

Our proprietary teaching approach, the Mathnasium Method™, powers this. Here is how it works.

Each student starts with a diagnostic assessment that identifies their current skills, strengths, and gaps. From those insights, we build a personalized learning plan customized to their goals, whether that means rebuilding procedural fluency, strengthening working memory through multi-step practice, or consolidating the specific skills the research identifies as most vulnerable to summer loss.

With the plan in place, our tutors follow it closely, delivering face-to-face instruction in a supportive environment. We teach for understanding, using clear everyday language and a mix of verbal, visual, mental, tactile, and written techniques so each concept lands before we move forward.

When students get stuck, we break the concept down into manageable steps and work through both the how and the why, so students leave each session with problem-solving skills they can apply independently.

We make sessions engaging, too. Games, earned rewards, and consistent celebration of progress keep learning purposeful and help students build confidence alongside fluency.

The results speak for themselves:

• 94% of parents report improvement in their child's math skills and understanding

• 93% of parents report an improved attitude toward math after attending Mathnasium

• 90% of students saw improvement in their school grades

With over 1,100 learning centers across North America, there is likely a Mathnasium close to you.

Families across Farmington, Kaysville, Centerville, and Fruit Heights trust Mathnasium of Farmington to help their children hold their math ground through summer and start the school year where they left off.

If your child needs targeted summer support before the new school year begins, our team is ready to help.

📅 Schedule a Free Assessment at Mathnasium of Farmington

Not near Farmington? 

📍 Find a Mathnasium Learning Center Near You