Working memory, the mental workspace your child uses to hold and manipulate information in real time, can be strengthened through a combination of daily habits and targeted practice. It’s the skill behind following multi-step directions, solving math problems mentally, and reading a paragraph while remembering how it started. The good news: working memory grows naturally throughout childhood and responds well to the right kinds of support.
What Working Memory Looks Like at Different Ages
Understanding where your child falls developmentally helps you set realistic expectations. A large nationally representative study tracked children’s ability to recall strings of digits, both forward (simple recall) and backward (which requires mentally flipping the sequence, a harder task that reflects true working memory). At age 5, children could repeat back about 5.5 digits forward but only about 1.3 digits in reverse. By age 8, those numbers climbed to roughly 8 forward and 3.6 backward. By age 12, children averaged about 9.5 forward and 5.4 backward. Growth is steepest between ages 5 and 10, then gradually levels off into the teen years.
This means a 6-year-old who can’t remember a three-step instruction isn’t necessarily struggling. Their working memory simply hasn’t matured enough yet. But if your child consistently falls behind peers in holding onto information, the strategies below can make a real difference.
Teach Chunking and Grouping Early
Chunking means combining individual pieces of information into meaningful groups so they take up less mental space. Adults do this instinctively when they break a phone number into segments. Children can learn the same trick, but they need explicit coaching.
Start with something concrete. If your child needs to remember a grocery list of six items, help them group the items by category: fruits together, dairy together. For spelling, break long words into syllable chunks rather than individual letters. Research shows that young children, especially those under about age 7, are less likely to naturally use structure to form these mental groups. That means you’ll need to model the process out loud at first: “Let’s put these into teams so they’re easier to remember.” Older children pick up on organizational structure more readily and can begin chunking on their own with practice.
Use Physical Activity as a Brain Booster
Aerobic exercise directly improves working memory, and the research is specific about what works. A study on school-aged children found measurable gains after a six-week program of moderate-intensity exercise, three days per week. Each session included 20 minutes of activity at 60 to 69 percent of maximum heart rate, roughly the level where a child is breathing harder but can still hold a conversation. Think jogging, swimming, cycling, or active playground games.
Sessions shorter than 20 minutes didn’t produce the same cognitive benefits, and high-intensity exercise was actually less effective for working memory than moderate effort. So you don’t need to push your child to exhaustion. Consistent, moderate movement is the target. If your child already plays a sport or bikes to school regularly, they may already be getting this benefit.
Consider Music Lessons
Learning a musical instrument requires a child to read notes, coordinate their hands, listen to what they’re producing, and hold a melody in mind all at once. That’s a serious working memory workout. A longitudinal study found that children aged 8 to 10 who participated in an instrumental music program for 18 months outperformed a control group on working memory tasks. Shorter durations of music training, around 6 to 12 months, improved pitch discrimination and auditory processing, but the working memory gains specifically appeared after the longer commitment.
This doesn’t mean a few weeks of piano lessons will transform your child’s memory. The benefits build gradually, which is one more reason to encourage sticking with an instrument rather than switching activities every few months.
Practice Simple Mindfulness Exercises
Mindfulness training reduces mind-wandering, which is one of the biggest enemies of working memory. When your child’s attention drifts mid-task, whatever they were holding in working memory tends to disappear. Training them to notice and redirect their focus can help information stick.
One study with young children used a structured program of just 20 minutes per session, twice a week, for about 7 to 8 weeks. The sessions focused on three areas: awareness of their own thinking (“my mindful brain”), tuning into sensory input (“my five senses”), and noticing the world around them (“my mindful world”). Children in the mindfulness group showed improved sustained accuracy on working memory tasks compared to the control group. At home, you can start simpler. Even a few minutes of focused breathing, where your child counts breaths or pays attention to the feeling of air moving in and out, builds the same attentional muscle. Body scan exercises, where they notice sensations in their toes, legs, stomach, and so on, also work well for younger kids who find sitting still with their eyes closed difficult.
Prioritize Sleep
Sleep is when the brain consolidates new information into longer-term storage, freeing up working memory for the next day. The American Academy of Sleep Medicine recommends that children ages 3 to 5 get 10 to 13 hours of sleep per 24 hours (including naps), and children ages 6 to 12 get 9 to 12 hours. Meeting these targets is linked to better attention, learning, memory, and emotional regulation.
If your child routinely gets less than the recommended amount, improving their sleep may do more for their working memory than any other single intervention. Consistent bedtimes, limited screen use before sleep, and a cool, dark room are the basics that make the biggest difference.
Reduce the Load at Home and School
While you work on building your child’s capacity, you can also reduce unnecessary demands on their working memory so they can use what they have more effectively. Three approaches work well:
- Simplify instructions. Instead of giving a child three tasks at once (“Put your shoes on, grab your lunch, and meet me by the car”), break them into one or two steps at a time. Have your child repeat the instruction back to you before starting.
- Use visual supports. Checklists, visual schedules, and posters with common reference information (like multiplication tables or frequently misspelled words) act as external memory. They free up mental space for the harder parts of a task.
- Restructure complex tasks. If a homework assignment involves multiple steps, help your child break it into smaller pieces with clear stopping points. This prevents the overwhelm that comes from trying to hold an entire project in mind at once.
Children with weak working memory benefit enormously from having information repeated to them and from having written or visual reminders of what they need to do. These aren’t crutches. They’re scaffolding that lets your child practice the thinking parts of a task without losing track of the procedural parts.
Be Cautious With Brain Training Apps
Dozens of apps and games promise to boost working memory through digital exercises. The reality is more limited. A consensus statement from scientists at Stanford’s Center on Longevity and the Max Planck Institute found that while cognitive training does produce improvement on the specific tasks being practiced, there is little evidence that these gains transfer to broader real-world abilities. The small improvements that do occur are often narrow and temporary. One study found that 100 days of practicing 12 different computerized tasks led to small general improvements in reasoning and memory in younger adults, some lasting up to two years, but this kind of intensive commitment is unusual and the gains were still modest.
This doesn’t mean memory games are useless. Playing card games like Concentration, doing puzzles, or practicing mental math can be fun ways to exercise working memory in context. Just don’t expect a $10-per-month app to replace the habits described above.
Nutrition That Supports Brain Function
Omega-3 fatty acids, found in fish like salmon and sardines, play a direct role in brain development and function. Your body can’t make them, so they have to come from food or supplements. Research on omega-3 supplementation in children has found improvements in attention, memory retention, and executive function, though results vary by dose. Studies using doses above 750 mg per day generally showed more meaningful cognitive effects, while lower doses around 200 mg offered only modest benefits. This suggests there may be a threshold below which supplementation doesn’t do much.
The simplest approach is to include fatty fish in your child’s diet two or three times per week. If your child won’t eat fish, a fish oil supplement can fill the gap. Beyond omega-3s, a balanced diet with adequate iron, zinc, and B vitamins supports the broader neurological health that working memory depends on.
When ADHD Is Part of the Picture
If your child has ADHD, working memory challenges are almost certainly part of their experience. Research using detailed cognitive testing found that 75 to 81 percent of children with ADHD show clinically significant working memory deficits, and the gap between children with and without ADHD is large. This isn’t a minor overlap. It’s one of the core cognitive features of the condition.
All the strategies in this article still apply for children with ADHD, but they may need to be implemented more consistently and paired with additional support. Visual schedules, broken-down instructions, and external reminders become especially important. If your child has been diagnosed with ADHD and is struggling academically, it’s worth specifically asking their school about accommodations that reduce working memory demands, such as providing written instructions alongside verbal ones, allowing extra time on tasks that require holding multiple pieces of information, and minimizing distractions in the learning environment.