A study from South Korea conducted on teenagers with internet and smartphone addiction demonstrated that their brains had higher levels of a neurotransmitter that slows down neurons, resulting in reduced levels of control and attention and rendering people more susceptible to distractions Another study by the London School of Economics and Political Science showed that banning smartphones in schools caused a clear improvement in students' test scores More that 90% of French children between the ages of 12 and 17 had mobile phones in 2016, up from 72% in 2005, according to French telecoms regulator ARCEP CNNs Frank Andrews and Sam Bradpiece contributed from Paris and Arnaud Siad contributed from london france Bans Smartphones in Schools Through th Grade. will It Help students Image Imane Belaroussi, from left, Grace Blahourou and Zoelinh Masson on their phones after school in Paris. Credit Credit Dmitry Kostyukov for The New York Times By Alissa J. Rubin and Elian peltier sept.20,2018 PARiS-The eighth-grade girls already know what to expect from france's new smartphone ban in all primary and middle schools because their school voluntarily instituted one last year. Annoying, was the assessment of Zoelinh Masson, 12, as her friend grace Blahourou, 13, agreedA study from South Korea conducted on teenagers with internet and smartphone addiction demonstrated that their brains had higher levels of a neurotramsmitter that slows down neurons, resulting in reduced levels of control and attention and rendering people more susceptible to distractions. Another study by the London School of Economics and Political Science showed that banning smartphones in schools caused a clear improvement in students' test scores. More that 90% of French children between the ages of 12 and 17 had mobile phones in 2016, up from 72% in 2005, according to French telecoms regulator ARCEP. CNN's Frank Andrews and Sam Bradpiece contributed from Paris and Arnaud Siad contributed from London. France Bans Smartphones in Schools Through 9th Grade. Will It Help Students? Image Imane Belaroussi, from left, Grace Blahourou and Zoélinh Masson on their phones after school in Paris.CreditCreditDmitry Kostyukov for The New York Times By Alissa J. Rubin and Elian Peltier • Sept. 20, 2018 • o o o o o PARIS — The eighth-grade girls already know what to expect from France’s new smartphone ban in all primary and middle schools because their school voluntarily instituted one last year. “Annoying,” was the assessment of Zoélinh Masson, 12, as her friend Grace Blahourou, 13, agreed