Excerpt from this article:
The way to a teenager’s brain is through their stomach. Students on two campuses can now earn discounts at local shops and eateries by building points on an app that measures whether they check their phones during class.
…When students arrive at their lectures, they open the app (which can tell when it’s in a campus classroom) then lock their phone. The app then measures how long they go before checking their phone again. The longer it stays locked, the more points they get, and the more hoagies/cheesesteaks/pizzas they get to redeem at participating locations. Because if highly-trained Ph.D.’s can’t get kids to focus, surely the promise of hot cheese can.