Do test scores improve after phone bans? Not really.

- High schools gain a little. Middle schools lose a little. The average is close to zero.

- Behaviour worsens before it improves when phones are removed. - Phone bans hurt wellbeing at first, then modestly help, but the effects are not large or transformative.

Bottom line: Lockable phone pouches reduce phone use and initially disrupt behaviour and wellbeing, but ultimately produce near zero overall effects on academic achievement. tom-dee.github.io/files…