This is a quick, but INCREDIBLY EFFECTIVE visual that I created that has helped my students so much. Is helps them to distinguish between the expectations of work time, vs. leisure time.
Print out the sheet (2 per sheet), laminate each half sheet, and give to each student. During work time (academics), have students CIRCLE "Work Time". Have a set of rules for work time so they understand the expectation for that time. During "earned play time", have the students circle "play time." For your students who have a difficult time conversing about topics that are appropriate to their tasks, this is a perfect visual.