The Effects of School Phone Bans

Overview

This 2026 working paper by Hunt Allcott and colleagues examines what happens when middle and high schools require students to place their phones in lockable pouches during the school day. Rather than asking whether phones are “good” or “bad,” the study asks a more specific design question: What actually changes when access to phones is physically restricted?

The researchers studied schools using Yondr-style pouches, which allow students to keep possession of their phones while preventing access until the end of the day. By 2026, nearly 5,000 schools were using this approach. The study compares schools before and after adoption with similar schools that did not adopt the pouches, using a large combination of GPS phone-location data, teacher surveys, student surveys, standardized test scores, attendance data, and disciplinary records.

What changed most clearly: phone use dropped

The strongest result is also the most straightforward: the pouches substantially reduced phone use during school.

GPS data showed a persistent decline in phone activity after schools adopted the pouches, reaching roughly a 30% reduction by the third year. Teacher reports suggested an even larger change: the share of students reported to be using phones for personal reasons during class fell from about 61% to 13%.

This matters because it shows that the intervention successfully changed the behavior it was directly designed to change. But that did not mean all of the hoped-for benefits automatically followed.

Academic performance: surprisingly little change

One of the most important findings is that reducing phone use did not produce a large overall improvement in academic achievement.

Across middle and high schools combined, average changes in standardized test scores were essentially zero. The researchers found small positive effects in high schools, especially in math, but small negative effects in middle schools. The overall academic gains were much smaller than advocates of phone bans might expect.

High-school math scores rose modestly, equivalent to roughly a 0.9 percentile-point increase, while middle-school effects were small and negative.

This is an important Humane Tech lesson: removing a distraction does not automatically create meaningful learning. Students may redirect their attention toward teachers and schoolwork—but they may also redirect it toward peers, other devices, boredom, conflict, or other distractions.

Attention: restricting phones did not clearly improve it

Perhaps the most counterintuitive result is that students did not report clear improvements in classroom attention after phones were restricted.

The researchers found no consistent positive effect on self-reported attention. In one later period, attention was actually lower, though the authors caution that this result is difficult to interpret because the comparison groups may already have been developing differently before the policy began.

This complicates the simple idea that:

phone removed → distraction removed → attention restored

Attention is not simply an empty space waiting to be reclaimed. It is shaped by motivation, classroom design, social relationships, habits, environment, and alternatives competing for attention.

Well-being: worse first, better later

The effects on student well-being were more dynamic.

In the first year of pouch adoption, students reported a significant decline in subjective well-being. By about two years after adoption, however, well-being had recovered and become positive.

The researchers suggest that this may reflect an adjustment period. Students may initially experience frustration, loss of autonomy, disruption of habits, increased monitoring, or changes in peer relationships. Over time, however, reduced dependence on constant connectivity and more face-to-face interaction could potentially improve well-being. The authors emphasize that these explanations remain uncertain.

For Humane Tech, this raises an important design tension: Can a technology restriction support long-term well-being while still creating short-term feelings of reduced agency?

Discipline: conflict increases at first

Schools experienced an increase in disciplinary incidents during the first year of implementation. Suspension rates rose by roughly 16% at the point of adoption, although the effect faded in subsequent years.

There are several possible explanations. Students may resist the new rule. Teachers and administrators may discipline students specifically for violating the phone policy. Students may also substitute other disruptive behavior for phone use.

This again illustrates that design interventions produce secondary effects. A policy intended to reduce distraction also changes authority, enforcement, relationships, and institutional behavior.

Attendance and online bullying: little measurable change

The study found little or no lasting effect on school attendance. There was also no clear reduction in students’ perceived likelihood of online bullying.

This may be partly because restricting phones during school does not eliminate digital life outside school. Online social interactions, harassment, gaming, social media, and communication simply continue at other times or on other devices.

Parents, students, and teachers see the intervention differently

The study also reveals a major stakeholder conflict.

Parents were generally supportive of phone bans and expected improvements in mental health, relationships, and academic performance. Students were much more skeptical and tended to oppose the pouches.

Teachers, meanwhile, reported major reductions in phone use and much greater satisfaction with school phone policies after Yondr adoption. Teacher satisfaction rose from approximately 26% to 75%.

This difference matters for humane design because different groups define a “successful” system differently. Teachers may value reduced classroom disruption. Parents may value safety and mental health. Students may value autonomy, communication, and control over their own devices.

The larger takeaway

The study’s most important lesson is not simply that phone bans “work” or “don’t work.”

They work extremely well at reducing phone use. But the wider consequences are mixed:

• phone use drops substantially
• academic improvement is small overall
• classroom attention does not clearly improve
• discipline gets worse at first
• well-being gets worse at first but may improve later
• attendance changes little
• online bullying does not clearly decline

The authors therefore conclude that phone restrictions produce real but more complicated effects than either supporters or critics might expect. They also caution that the study only observes schools for up to about three years after adoption and examines one particular intervention—lockable pouches—so other approaches may produce different results.

Humane Tech connection

For this course, the article is especially useful because it shows the difference between controlling a technology and redesigning the conditions around it.

A lockable pouch is essentially a strong technological default: instead of asking students repeatedly to exercise self-control, the environment makes phone access difficult. That may protect attention, but it also restricts autonomy. The study suggests that humane design cannot be evaluated by asking only, “Did the intervention stop the unwanted behavior?”

A better set of questions would be:

• People Care: Does the intervention support well-being, learning, relationships, and meaningful attention? Does it have a positive counterpart, ie-increasing in-person interactions in class?
• Fair Share: Who gets to decide the rules? Whose needs are prioritized—students, teachers, parents, administrators?
• Agency: Does the design help people develop healthier habits and judgment, or simply remove their ability to choose? Are there options for students choosing but with consequences? What is the relationship between individual autonomy and class dynamics?
• Systems thinking: When one behavior is blocked, what replaces it?
• Design effectiveness: Are we measuring what is easiest to measure—phone use and test scores—or what actually matters most? What is the role of attention in this context?

The article ultimately presents phone restriction as a useful case study in humane defaults: changing the environment can powerfully change behavior, but good design must also consider adaptation, agency, relationships, unintended consequences, and the difference between reducing a problem and creating a better alternative.