High Schooler Can’t Count Coins? Why It Happens And Low-Stress Ways To Help
The self-checkout screen at our neighborhood Kroger blinked “insert exact change” and Javi, my 10th grader, froze. It was 4:30 on a Tuesday, he still had his cross country uniform on, one hand curled around a half-empty blue Gatorade, the other hovering over the coin purse he kept in his backpack for locker fees. The woman behind us had a cart stacked with Greek yogurt and frozen broccoli, and I watched his ears go pink as he nudged a quarter and a dime around the little plastic shelf like they were unlabeled buttons on a remote.
“I got it,” he said before I could offer to switch to Apple Pay. He knew how to do this, he mumbled. First grade stuff.
He dumped all the change out, tried to add as he went, lost his place twice, then ended up shoveling every coin into the slot at once. The machine whirred, spat three pennies back into the return, and the attendant had to wander over to reset the prompt. By the time we got out to the car, Javi was staring out the window, jaw tight. “I don’t know why I can’t do that,” he said. “I do algebra 2 homework in 20 minutes. Coins shouldn’t be this hard.”
I’d noticed the pattern before. He’d dump out his old piggy bank when he wanted cash for a used video game, restart the count three or four times, then give up and ask me to spot him the difference. For a long time I wrote it off as laziness, or him just rushing. Counting coins is the first math skill most kids learn, right? Flashcards, plastic play money, piggy banks on the dresser. We did all that when he was little. But by the time he was 8, I paid for almost everything with a card, then my phone, and loose change just became something you dumped in a jar and forgot about. I figured he’d pick it up eventually. He didn’t.
At his 504 check-in last semester (he’s had accommodations for ADHD since middle school), I mentioned it offhand to his resource teacher, Ms. Henderson, expecting her to say he just needed to focus more. Instead she nodded, said she sees this every single year, even in juniors and seniors. Last semester she did an informal check in her personal finance class, asked 32 11th graders to count out $1.37 in loose change in under 30 seconds. Only 9 could do it. She never does whole-class coin counting drills anymore, because it only humiliates the kids who haven’t mastered it; she folds practice into personal finance units and frames it as a universal rusty skill, not a first-grade review.
Most teens never touch cash from one week to the next, she explained. For kids with working memory gaps, common with ADHD, anxiety, or undiagnosed math differences, it’s even harder. It’s not that they don’t know what each coin is worth, most of the time. It’s that counting loose change is a multi-step task that asks you to hold a running total in your head while you sort, identify, and add the next coin, often while someone waits. If your brain drops one number mid-step, you have to start all over. For Javi, the extra layer of “this is supposed to be easy, I’m stupid for messing this up” makes the working memory block even worse.
A couple weeks after that grocery store trip, I found him cross-legged on his bedroom floor, his 5th birthday soccer ball piggy bank split open on an old towel, coins spread all over his carpet. He was trying to count up enough to buy a used Xbox controller from a kid in chemistry, and he’d already restarted four times. “The stupid dime is smaller than the nickel,” he huffed, holding both up. “Why is that? Who made that rule?” That’s the other overlooked quirk: coin values don’t line up with size, which is counterintuitive when you’re rushing. Most people get enough repetition as young kids that the values become automatic, but if you miss that window, it’s just a weird, arbitrary fact your brain won’t hold onto under pressure.
Ms. Henderson told us not to break out first grade worksheets or drill him with flashcards. That’s the fastest way to make a 16-year-old shut down and refuse to engage at all. Dignity matters more than squeezing in 10 minutes of practice a day. So we started small, no fanfare. I bought four 99-cent mason jars at the dollar store, wrote Q, D, N, P on the lids with a Sharpie, and set them on the narrow shelf by our front door. No speech about practicing, no “this is for your coin counting.” I just said I was tired of loose change getting lost in jacket pockets, so everyone dumps their change here when they come in. Once a month, whatever’s in there is his, for gas for his moped, as long as he counts it and rolls it for the bank.
The first month, he kept mixing up nickels and dimes halfway through. He got a pack of tiny blue dot stickers from the school supply bin and put one on the edge of every nickel that went through the jars. It sounds silly, but it cut his restarts in half the first time he counted. He also typed a one-line note in his phone, just “25 Q, 10 D, 5 N, 1 P,” that he can pull up if he panics when he’s out. It looks like a random homework reminder if anyone glances over his shoulder, no one has to know it’s a cheat sheet. The biggest shift, though, was sorting first, adding later, instead of counting one random coin at a time. He sorts all quarters into one pile, counts them, multiplies by 25, jots that number on a scrap of paper, then moves to dimes, nickels, pennies. Holding the total on paper means he doesn’t lose it mid-step.
I learned the hard way not to draw attention to it around his friends. A few months ago, at a taco truck with his cross country teammates, I offhandedly suggested he use cash to practice, and he went bright red, tapped his watch to pay before the cashier even finished ringing us up. After that, we had an unspoken rule: no quizzing, no comments about practice in front of other people. If he wants help, he asks. If he’d rather tap to pay, that’s fine. I also stopped saying patronizing lines like “everyone learns at their own pace,” which makes a teen feel even more like he’s being treated like a toddler. Instead, after the grocery store incident, I told him about the time I paid for coffee with a dime thinking it was a quarter, and the barista handed it back in front of a whole line of people. Most adults fumble this when they’re out of practice, I said. Almost no one under 40 pays with cash regularly these days. He’s not weird for being rusty.
Last month, we did a neighborhood yard sale to clear out the garage, and Javi offered to run the checkout table while I hauled furniture out to people’s cars. A woman bought three of his old hoodies and a chipped mug for $4.25, handed him a $10 bill, and he sorted the change, counted it out, and handed it back in 10 seconds flat. After she walked away, he glanced over at me and gave a tiny, quick nod, like he didn’t want to make a big deal out of it. Twenty minutes later, a guy bought a whole box of my husband’s old tools for $27, paid in a crumpled $20 and a handful of loose change, and Javi messed up the count twice, ended up handing over 15 cents too much. He just shrugged and laughed it off when he realized. “Guy bought all the rusty wrenches,” he said. “He earned the 15 cent discount.”
I still sometimes catch myself worrying this is a sign of a bigger gap we missed, something that will trip him up as an adult. But both his teacher and pediatrician have repeated the same point: this isn’t about intelligence, or even raw math skill. It’s about exposure. We’re raising a generation of kids who almost never handle physical coins, yet still treat an inability to count them quickly as a red flag. For kids who already struggle with working memory or anxiety, that gap widens, and the shame makes catching up on your own almost impossible.
Last weekend, he counted up two months of change from the mason jars, rolled all the coins, and took them to the bank. He walked away with $48, put every cent toward a new helmet for his moped. He only had to restart the count once. Last Tuesday, we were back at that same Kroger self checkout, buying more granola bars for cross country, and the screen blinked for 78 cents exact change. He sorted the coins in seconds, slid them into the slot, and the machine accepted it on the first try. He didn’t say anything, I didn’t either.
He still fumbles when there’s a long line. Some days he still mixes up nickel and dime values when he’s tired after practice. Most days, he still just taps his watch to pay. That’s okay. It doesn’t have to be perfect. He just has to know how to work through it when he needs to, and not feel like an idiot over a handful of change.
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