The promise of technology is to liberate teachers from those largely mechanical chores so that they have more time for human interactions. In many standard classrooms, teachers are so overburdened with mundane tasks that they are lucky to carve out 10 or 20 percent of class time to actually be with students—face-to-face, one-on-one, talking and listening. Imagine what could happen if that figure went to 90 or 100 percent of class time. The student-to-time-with-the teacher ratio would improve by a factor of five or ten. And this is the metric we should care about.
