Limiting smart phone use in schools is reasonable, at least in my personal experience. When one of my children was in high school, ubiquitous social media had a powerful negative impact and we eventually had to move her to a different school. I have seen firsthand how negative use of social media can erode a child’s well-being. However, as a Learning Scientist who specializes in rigorous research on educational technology, I also know that “technology” is an expansive category.