If I could make one arbitrary, sweeping policy change, I would ban chairs in schools.
I’m completely serious. Chairs are terrible, and we teach children to use them way too early. And then we’re surprised when people grow up sedentary and with perennial backache.
Chairs are designed for a single, unchanging height. The result is people learn to sit very poorly. Too tall? You end up sitting cross-legged and destroying your ankles. Too short? Say goodbye to your posture.