Turning homework time into contact time : In a traditional class, much of the work that the students do is invisible to the teacher. For some aspects, such as homework problems, teachers can observe the results but are often severely limited by time constraints. In other cases, such as comprehension of assigned readings, the students’ work is invisible to the teacher and can be observed only indirectly and with significant effort. Personalized learning approaches often allow the teacher to observe the students’ work in digital products, so that there is more opportunity to coach students. Further, personalized learning often identifies meaningful trends in a student’s work and calls the attention of both teacher and student to those trends through analytics.