Some dreary November day my junior year of high school, I plugged away at a calculus test. As I calculated how quickly the height of water was changing in a tank draining at some fixed rate, I felt it emanating from my right pocket. Buzz. I knew exactly what it was: a group chat of my friends who attended another high school, texting over their lunch hour. This wasn’t an uncommon occurrence — my phone often blew up during this class, text after text, notification after notification.