On my iPad screen I would be able to see an icon next to each child's name, of the apps they are using, all at the same time.
Forever (about 3 years now), I have wanted a way to monitor student screen time, in another way other than the honor system (which HAS worked), and I'm thrilled with the idea given to me today by a fifth grader!
http://cdn.redmondpie.com/wp-content/uploads/2016/03/classroom-ipad-02.jpg