I have been doing more circuit work this year and the kids really like it. Warm-up circuits are great because they give my students some autonomy (they choose where to start), are fast paced, and get everyone moving. When my students enter on circuit day, they see 10-12 cones set up in a big circle. They can choose where they start, but I give a limit to how many can be at one cone (usually 3-4 students per cone). Each cone is labeled with an exercise. As students move around the circle they should be alternating between a stretch, a cardio exercise, and a strength exercise. For example, calf stretch – jumping jacks – plank. Once the students have chosen their beginning cone, I give a start signal. Every 30 seconds I give the signal to move to the next cone. Use a timer or music with interval breaks to keep consistency on the time. I walk around and correct form as much as I can. When students have gone all the way around the circle, warm-up is done! My students look forward to circuit day and they always work hard.