Thomas, These sound like great instructional strategies. Off task can certainly apply the student comprehension of required coursework. Another type of off task is the distracted student (seemingly, distracted as they appear to not be paying attention). In this sense, ways to reengage may involve simple things like calling on students, asking to rephrase something, or even simpler, just standing next to a disengaged student, or taking a break. More stronger methods are sometimes needed, and these may include changing activities, such as moving to a lab mode. Barry Westling