I saw this at a convention and tried it with my students. It's simple but they loved it and it helped break up longer lessons or note taking sessions. Students were energized and ready to get back to work. Students follow the directions given on the first slide. In Round 1 students raise right or left hand based on the letter they see. In Round 2 students raise hands and also stand or sit based on the letter shown. The teacher or presenter can decide how quickly to move from one slide to another. You can also easily edit the number of slides in the activity.