Norway’s school smartphone ban is working.

In unsurprising news, middle school kids in Norway have been feeling mentally healthier and performing better academically since a public health initiative banned smartphones in schools, according to a new study. After three years of the policy, girls’ GPAs increased, while visits to mental health professionals decreased by 60%—and girls from lower-income families benefited the most. There wasn’t much effect on boys’ academic standings, but both boys and girls experienced 43%–46% less bullying after putting their phones away.