In an era when screens have become as common as pencils in the classroom, Mexico's President Claudia Sheinbaum has chosen to draw a firm line — restricting not just cellphones but digital screens broadly across the nation's schools, with the policy taking effect in November. The decision places Mexico within a growing international current of governments concluding that the presence of devices during instruction quietly erodes the conditions necessary for learning. It is a moment that asks an old question anew: what does a space devoted to the formation of young minds truly require, and what m