the “after” classroom Britt envisioned, some students might be working together on an assignment appropriate to their shared level of competence. Others would be ranging ahead on their own, catching up, exploring a special interest. A small group might be gathered around the teacher, who, having instantly scanned the responses to a short-answer exercise just given to the whole class on the tablet, decides to spend some extra time with those students still hazy about the lesson. Britt repeatedly made a fluid gathering-and-pushing gesture with both hands, as if demonstrating a basketball chest pass, as he said: “Then you move that group out, they’re off practicing to reinforce what you just taught them, and you pull together another group, or you go to an individual, then you flow them out to the next task. Gather and flow.