A new paper from the National Bureau of Economic Research challenges the assumption that locking phones boosts learning. Analyzing location data from more than 40,000 schools between 2019 and 2026, researchers found cellphone bans produced zero measurable change in standardized test scores, across elementary, middle, and high schools. The findings, first reported by The New York Times, suggest the policy may be more symbolic than effective.

Short‑term disruption surfaced: disciplinary incidents rose briefly while students reported lower well‑being during the first months of enforcement. Over the subsequent years, well‑being metrics rebounded and disciplinary referrals fell, indicating schools adjusted to the rule. Yet the study saw no shifts in attendance, self‑reported classroom attention, or perceived online bullying, underscoring limited educational impact, and teachers noted a dip in focus.

Policymakers in France and South Korea have rolled out nationwide bans, while a UK trial reported similar null effects on screen time and student welfare. The new evidence gives districts a data‑driven reason to reconsider blanket prohibitions and focus on targeted digital‑literacy programs instead, as parents voice concerns over digital distraction. Ultimately, the research suggests banning phones alone rarely translates into academic gains.