A school phone ban clears phones out of class. Teachers at US pouch schools say in-class phone use fell from 61% to 13% (Study). But a ban on its own does not appear to improve teen mental health. In a peer-reviewed study of 30 English schools, 1,227 pupils at strict and relaxed schools reported the same well-being (Study).
By 2026, nearly 5,000 schools were using locked phone pouches (Study). Test scores at those schools barely moved over three years (Study). In England, pupils at strict schools seemed to make up the lost phone time after the bell (Study).
The US numbers come from a large working paper, which means outside experts have not reviewed it yet (Study). The English study has been peer-reviewed, but it captures a single moment in time. And a 2024 review found no study that let chance decide which schools got a ban (Review).
What a School Phone Ban Is
School phone bans range from mild to strict. The mildest is a no-show rule: phones can come to school but must stay out of sight. Other schools send phones into backpacks or lockers, or ban them only at recess.
A national survey asked 2,502 US parents of 12- to 17-year-olds about their child’s school (Study). The most common rule, reported by 46.2% of parents, kept phones out of class but allowed them at other times.
The strictest version is the locked pouch. Students seal their phones in a magnetic pouch when they arrive. They keep the pouch with them, but it has to stay shut until the end of the school day (Study). Yondr is the leading maker of these pouches.
Almost every school now has a phone rule. In the same parent survey, 98.7% of parents said their child’s school had a phone policy of some kind (Study). By 2026, roughly two-thirds of US states had passed laws limiting student phone use (Study).
Schools have a reason to act, because phones take up a real slice of the school day. One study used a research app to track the Android phones of 640 US teens. They averaged about an hour on their phones during school hours (Study). Social media took the biggest share of that time.
A smaller study of 79 iPhone users aged 11 to 18 found about two hours per school day, spread across every hour of it (Study). The 51 older teens, aged 15 to 18, checked their phones about 64 times during school hours. In about 30 of them, more frequent checking went with weaker self-control on a short computer test. That link comes from a small group measured once, so it does not prove cause. The two studies measured different phones in different teens, so a fair range is one to two hours a day.
Phones Really Do Leave Class
This is the part of a ban that clearly works. The first national US study followed middle and high schools that adopted Yondr pouches between 2023 and 2025 (Study). It compared how they changed over time with similar schools that had not adopted pouches. The team posted its analysis plan in advance, which makes it harder to pick only the flattering results.
A national survey drew nearly 108,000 responses from teachers and school staff (Study). At schools that switched to pouches, the share of students using phones in class for personal reasons fell from 61% to 13%. The share of teachers satisfied with the school’s phone policy rose from about 26% to 75%. These numbers come from teachers looking back on how things were before, not from a measured experiment. Schools without pouches improved too, just much less.
Phone location data points the same way. Location pings from phones on campus during school hours fell about 30% by the third year (Study). The authors treat that as a minimum, because adults’ phones are counted too.
Yondr, the pouch maker, supplied the school data and is thanked as a research partner (Study). The named funders are foundations and policy groups. Two authors disclose consulting work related to tech companies. The paper has not been peer-reviewed.
The SMART Schools study in England found a similar drop. It compared 30 secondary schools, 20 with strict phone rules and 10 with relaxed ones (Study). Pupils at strict schools spent about 40 fewer minutes on their phones during school hours. They also spent about 30 fewer minutes on social media in that time.
Break time may get a small bonus too. Six Danish schools banned phones at recess for four weeks, for children aged 10 to 14 (Study). The share of kids sitting still at recess fell from about 42% to 37%. The shift was bigger in girls. Phone use seen at recess dropped from 18% of children to almost none. Hard, running-around play dipped while moderate movement rose, so most of the gain was gentler activity.
That study had no comparison schools and ran during the COVID-19 pandemic, so it cannot prove the ban caused the change (Study). About a third of children still said they used a phone at recess. The larger English study found that strict-school pupils were no more active across the whole day (Study). The recess bonus is possible, but it is not proven.
The Bumpy First Year
Parents should expect a rough start. In the national pouch study, suspensions rose about 15% in the year a school adopted pouches (Study). By the following year, the rise had faded. The authors offer two possible reasons and call both guesses. Enforcing a new rule can cause clashes, and some students may find other ways to act out.
Well-being followed a similar curve. In student surveys, well-being dipped in the first year, then turned positive by the second year after the switch (Study). The authors urge caution here. Most of the early dip came from schools that switched in 2025. The rebound, by contrast, came mostly from schools that switched in 2023.
That means the curve may partly reflect differences between groups of schools. Averaged across all the years, well-being came out slightly lower, by an amount chance could explain. The authors add that their data rule out even a modest overall boost.
A Florida study saw the same early spike. One of the 10 largest US school districts began enforcing a full-day phone ban in September 2023 (Study). In the month after enforcement began, the suspension rate more than doubled compared with the month before. Across the first year, in-school suspensions rose about 20% (Study).
The rise did not hit all students equally. Among Black students, in-school suspensions rose about 30%, while White and Hispanic students saw no clear change (Study). By the second year, the extra suspensions had mostly disappeared.
Neither the Florida paper nor the national study has been peer-reviewed yet (Study). Both point to the same lesson: enforcing a ban creates conflict of its own. How a school rolls out a ban, and who ends up punished, deserves as much thought as the rule.
Grades Barely Move
In the national pouch study, average test scores were almost unchanged over three years (Study). High schools saw a small gain in math, while middle schools saw a small dip. Attendance did not change, and students reported no clear gain in paying attention in class (Study).
Florida looks a little better. Scores rose mainly in the ban’s second year (Study). Students, mostly in middle and high school, also missed 5% to 10% fewer school days without an excuse. The authors estimate that this alone may explain nearly half of the score gain (Study). They caution that the drop in absences may also reflect other changes at school.
Older peer-reviewed work found something similar. Researchers surveyed schools in four English cities and heard back from 91, each with its own phone rules (Study). Exam results rose a little after a ban (Study). Most of the gain went to students who were already struggling, while top students were neither helped nor harmed (Study). Schools where students did not really follow the ban saw no clear gains. That data ran from 2001 to 2011, before most teens carried smartphones.
In Norway, a peer-reviewed study of middle-school bans found that grades did not change on average (Study). Girls did better, though, especially girls from poorer homes. In an earlier working version, girls’ grade gains looked larger at schools where phones were handed in each morning (Study). An analysis that pooled five studies also found no clear effect of bans on grades (Meta-analysis).
Any gains in grades are small, and they take time to show up. A ban may help some students in some schools, mostly after the first year.
Why Mental Health Stays Flat
For most parents, this is the big question. SMART Schools is among the strongest peer-reviewed tests of bans and teen well-being so far. It surveyed 1,227 pupils aged 12 to 15 in 30 English schools (Study). Pupils at strict schools had the same well-being as pupils at relaxed ones. Their anxiety, depression, sleep and grades did not differ either.
The likely reason is that the minutes saved at school came back later. Across a whole weekday, and across the weekend, strict-school pupils used their phones just as much (Study). An independent commentary in the same journal made the same point: pupils made up the time outside school (Commentary).
What tracked with well-being was total phone use, whatever the school’s rule. Pupils who spent more time on phones and social media across the week were worse off. They had lower well-being, more anxiety and depression, and less sleep (Study). More phone use during lessons went with more disruption in class. It also went with more pupils missing their target grades.
The study has real limits. It is a one-time snapshot, so it can show links but not cause. Only about one school in ten that was asked agreed to take part (Commentary).
An Australian study checked a ban after one month. It surveyed 1,282 students at five public secondary schools in South Australia, though only 597 answered both surveys (Study). Schools with and without a ban did not differ in problem phone use, effort at school or sense of belonging. Only 2.6% of students reported problem phone use at all.
One month is short, and chance did not decide which schools got a ban. The comparison is also muddy, because the schools without a ban brought one in by the second survey.
The same study showed who tends to ignore a ban. Older students, and teens who often posted on social media, were less likely to follow it (Study). The teens most drawn to their phones may be the hardest to reach with a ban.
Norway saw a brighter picture for girls. After bans, girls made fewer visits to mental-health specialists, and bullying fell for both boys and girls (Study). The earlier working version put the drop in girls’ specialist visits at almost 60% (Study). Yet the share of girls diagnosed or treated did not change. Across all students, the published study found that mental health did not change on average.
The bullying results are hopeful but mixed. An analysis that pooled five studies found a small gain in how students got along at school (Meta-analysis). That measure lumped bullying in with classroom conflict and satisfaction. Much of the result came from one Czech study. The national US pouch study found no clear change in how likely students thought online bullying was (Study).
The wider research is thin. A 2024 review of 22 studies found none where chance decided which schools got a ban (Review). Twelve of those studies were done by students working on graduate degrees (Review).
On mental health, those studies pointed both ways. Two reported benefits, but both relied on what teachers and parents thought. Two found no difference. Three found harm, with students saying they felt more anxious without their phones (Review). The review’s authors called the evidence for bans weak and inconclusive.
A real trial is now under way in Lima, Peru. Chance decided which of 104 public secondary schools would lock phones in pouches from September to December 2025 (Trial). Those schools also ran an awareness campaign. No results have been posted yet.
For now, what kids do on their phones outside school seems to matter more than the hours the phone spends locked away.
Frequently Asked Questions
Does a School Phone Ban Improve Mental Health?
Not on its own, based on current evidence. A peer-reviewed study of 30 English schools found that pupils at strict and relaxed schools had the same well-being. Pupils at strict schools made up the lost phone time after school (Study). A national US working paper saw a dip in the first year, then a possible rebound by the second (Study). Its authors read that rebound with caution.
Do Phone Bans in Schools Raise Test Scores?
Barely, on average. In US schools with locked pouches, test scores were almost unchanged over three years (Study). In one Florida district, scores rose a little in the ban’s second year, and fewer missed days may explain part of that (Study). Both are working papers, so outside experts have not reviewed them yet.
Why Do Suspensions Go Up After a Phone Ban?
One likely reason is that a new rule has to be enforced. In the national pouch study, suspensions rose about 15% in the first year, then faded (Study). In Florida, the rise fell hardest on Black students and began to fade after the first year (Study).
How Can Parents Reach Their Child If Phones Are Locked Away?
The school office still works, as it did before phones. In a survey of 2,502 US parents, 38.5% said they contacted their child several times a day (Study). Kids whose parents got in touch more often were more likely to break the rule. So were kids with a health condition or disability. If your child has a health need, ask the school about planned exceptions.
Key Takeaways
- Phones really leave class. After locked pouches arrived, teachers said the share of students using phones in class fell from 61% to 13% (Study).
- Expect a rough first year. Suspensions rose about 15% and well-being dipped in the first year. Suspensions then faded, and well-being may have recovered (Study).
- Grades move little and slowly. Average test scores barely changed over three years in US pouch schools (Study). Florida’s gains came mainly in the second year (Study).
- No mental-health boost in the English study. Strict English schools cut about 40 minutes of phone use at school, but pupils made it up after the bell (Study).
- The evidence is still early. No trial where chance picked the schools has reported results yet (Trial). The two big US studies are working papers, and Yondr supplied data for one (Study).
Help Your Kid Beyond the Bell
If your child’s school brings in a ban, back it. Far fewer phones show up in class, and the rough first year tends to pass (Study). But put most of your own effort where the evidence points: evenings and nights.
Three steps are worth trying. First, have phones charge outside the bedroom at night. More phone time went with less sleep in the English study (Study), and a phone on the nightstand makes late scrolling easy.
Second, watch for compulsive checking rather than counting hours. The Australian team notes that locking a phone away may not change the urge behind problem use (Study). If your teen reaches for the phone without thinking, talk about that habit.
Third, cut back on your own texts during the school day. Kids whose parents contacted them more during school were more likely to break the rule (Study). A message from you is still a reason to reach for the phone.
Adults struggle with this too. For the grown-up version, see what happened when adults blocked mobile internet for two weeks. Trying it yourself may make evening rules easier to agree on at home.
A phone ban is a reasonable rule for the school day. The hours after the bell are still up to your family, and that is where your effort seems to count most.
The research on school phone bans is young, and the first real trial has yet to report. It is worth watching, and worth a calm talk at home.
This article is for educational purposes and is not medical advice. Talk to a qualified clinician before changing your health regimen.
Leave a Reply