Do School Phone Bans Actually Work?

A school announces a phone ban and every parent hears something different in it. Some hear relief — an institution finally doing what one family can't enforce alone. Others hear a policy that can't reach their kid if something goes wrong at 2pm on a Tuesday. Both reactions are reasonable, and neither is settled by "the research says it works," because the research does not say one thing.

Here's the honest answer: two of the most rigorous studies available, in two different countries, land in different places. A large study of one Florida school district found a real test-score gain by the ban's second year — alongside a sharp, racially uneven rise in suspensions in the first. A UK study of 1,227 teenagers found no benefit at all: not to wellbeing, not to grades, not to classroom behaviour, and its own authors say they know why. Neither result cancels the other out — they measured different things, in different places, under different definitions of "ban."

What follows is what has actually been measured, what "a ban" turns out to mean in practice, and the objections — reaching a child in an emergency, a medical device that needs a phone nearby — that stay reasonable even when a policy document has an answer for them.

Key Takeaways

• The best US evidence (a large Florida district, NBER Working Paper No. 34388) found a modest test-score gain in a ban's second year, but suspensions rose sharply in year one — about 20% overall, driven mostly by a roughly 30% rise for Black students.
• The best UK evidence (SMART Schools, 1,227 teenagers, The Lancet Regional Health – Europe) found no measurable benefit to wellbeing, anxiety, depression, sleep, activity, behaviour, or grades — its authors say school hours are too small a share of a teenager's day to move the total.
• "Ban" is not one intervention. It can mean a locked pouch, a locker, a bag rule, or an unenforced sentence in a handbook, and neither study compared these against each other.
• Restricting phones in school didn't reduce the UK study's teenagers' phone use across a full week — a school-hours ban has a structural ceiling on what it can change.
• Reaching a child in an emergency and accommodating a medical device are real concerns, addressed by exception clauses in policy — not resolved either way by either study's data.

The Florida study: a real gain, and a real cost

The most rigorous US evidence comes from economists David Figlio and Umut Özek, who examined Florida's statewide bell-to-bell cellphone ban in one large, anonymous school district — one of the ten largest in the country. Florida was the first US state to require the policy, in May 2023, and the researchers measured compliance directly, via anonymized smartphone location-ping data showing phone activity on campus before and after.

In the ban's second year, test scores rose — by about 0.6 percentile points pooling every testing period, or about 1.1 points on the highest-stakes spring tests alone. Either way, a small, real effect, landing unevenly: reliably present for White students, boys, and middle/high schoolers; essentially absent for girls and elementary-age children. For Black students — the group with the largest disciplinary cost — the result depends on the specification: the main analysis found a positive but not statistically reliable effect; a secondary one using only spring tests found a gain similar to White students'. The authors flag the racial gap in discipline rather than explain it away.

That cost showed up immediately: in-school suspensions rose about 20% districtwide in year one, driven almost entirely by Black students (+30%), no significant change for White or Hispanic students, and a rise for boys but not girls. By year two, the spike had faded, and elementary schools — where suspensions are rare regardless — saw no increase.

Two caveats: it's a working paper, posted October 2025, not yet peer-reviewed, and not a randomized trial — every school was banned at once, so the researchers compared schools with more pre-ban teenage phone activity to schools with less. Clever, but not a lottery, and it describes one district in one state.

The UK study: no benefit to wellbeing, grades, or behaviour

The largest UK study asked a more direct question: does a ban help how a teenager actually feels? A team led by Victoria Goodyear at the University of Birmingham ran the SMART Schools study, surveying 1,227 students aged 12–15 across 30 English secondary schools — 20 with policies restricting daytime phone use and 10 that allowed some use (more on what "restricting" covered below).

On the study's main outcome, a validated mental-wellbeing scale, there was no meaningful difference between groups (adjusted mean difference −0.48, p = 0.62 — not significant). Nor was there a difference in anxiety, depression, sleep, physical activity, disruptive classroom behaviour, or teacher-rated attainment in English or maths. Students at restrictive schools used phones about 40 minutes less during the school day itself — but there was no difference in total use across a full week. The authors' explanation: school-day use is only a small slice of a teenager's total, so cutting it there barely moved the daily figure, and the wellbeing null followed from that.

This is a cross-sectional study — schools weren't randomly assigned a policy, and the authors note reverse causality can't be ruled out (a school already struggling with wellbeing might be more likely to adopt a ban, not the reverse). It also measures attainment differently — a teacher's on-target/below-target judgment, not a standardized score. A different question than Florida's, not a wrong one.

Wellbeing, attainment and behaviour aren't the same question

It's tempting to read one study as "bans work" and the other as "they don't," but they weren't testing the same claim. Figlio and Özek measured test scores and discipline; they did not measure wellbeing. Goodyear's team measured wellbeing, attainment and behaviour together, and found nothing on any of the three — a broader null than the "no wellbeing benefit" label sometimes attached to it. A maths-percentile claim, a how-a-teenager-feels claim, and a classroom-disruption claim are three different things — worth asking which one a school, or a headline, is actually making.

That distinction matters for the wider argument about phones and the teen mental health crisis, too. It's genuinely contested among researchers, and nothing here settles it either way: one study didn't test wellbeing at all, and the other found no wellbeing difference between two school policies — a narrower finding than a verdict on smartphones and adolescent mental health broadly.

What "a ban" actually means

Both studies treat "ban" as a single dial, and it isn't. In the UK study, "restrictive" covered five arrangements: locked in a bag, stored in a locker, handed into a pouch, deposited at reception, or banned from the premises. A locked pouch is a different intervention from a bag rule a student can quietly ignore — but the study grouped all five together rather than testing which worked best. Florida's law required schools to restrict phone use during the school day but didn't mandate one method; some use lockable pouches, some classroom caddies, some just a stated rule.

England's incoming national guidance follows the same pattern. Its statutory guidance, "Mobile phones in schools," which schools must follow from 1 September 2026, requires schools to be "mobile phone-free by default" but leaves the mechanism — pouch, locker, or bag — to each school. If your child's school's "ban" is really an unenforced line in a handbook, neither study is describing it.

The objections that aren't irrational

The most common objection parents raise isn't about test scores. It's "what if I need to reach my child, or they need to reach me." That's not paranoia — even the Florida researchers note in passing the real "concerns among parents that cellphone bans in schools could hinder effective communication with students in case of an emergency."

England's new statutory guidance treats that concern, and a second, distinct one — a medical need — differently. For routine contact, it directs parents to the school office rather than the child's phone. For a genuine medical need — its example is diabetes managed via a phone-linked glucose monitor — it says blocking that use would likely breach a school's duty to support pupils with medical conditions, and a disabled student may be entitled to keep phone access as a reasonable adjustment under the Equality Act. None of that is evidence a ban improves anything; it's an acknowledgment, in policy rather than research, that a blanket rule needs a stated exception before it earns trust — the same conclusion our piece on workplace phone bans reaches for on-call adults.

There's also a structural ceiling: a teenager is at school roughly a third of waking hours, and SMART Schools' finding that restricting phones in class didn't move total weekly use shows the rest of the day matters more than the classroom. Fewer phones out during lessons is not the same as less phone use, full stop. If total use is the real worry, a school policy was never the whole answer; see our age-by-age screen time guide for what changes at home.

What to ask your child's school

• **What's the actual mechanism** — locked pouch, locker, bag rule, or an unenforced policy — and who checks it?
• **What counts as an emergency**, and how does a parent reach a child, or a child reach a parent, during the day?
• **What's the stated exception** for a medical device or a disability-related need, in writing?
• **Is discipline applied evenly?** Florida saw suspensions spike hardest for Black students in year one — worth asking if a school tracks its own numbers for the same pattern.
• **What outcome is the school actually claiming** — scores, behaviour, or wellbeing? A school that can't say which it's chasing can't tell you whether the ban worked.

The honest bottom line

There's no verdict here to hand a school board or a family group chat. A rigorous quasi-experimental study found a real, modest test-score gain from a full-day ban, alongside a racially uneven disciplinary cost in year one that faded by year two. A rigorous observational study found no benefit at all — wellbeing, grades, or behaviour — and explained why: school hours are too small a share of a teenager's day to move the total. Both are honest findings. Neither is a verdict on whether phones are harming a generation — that question is bigger than either study, and remains open. What a parent can reasonably ask for isn't a promise. It's specifics: what the ban actually requires, who's exempt and why, and which outcome the school is claiming it will change.