Remember the Game “Simon Says”? You couldn’t find a better, and more fun game, to use to learn how to use imperatives and my students love it, regardless of their age.
Have all your students stand up and to one side of their desk, if possible. With large classes (50-plus, like we often have in Thailand), this can be more difficult for the teacher as you have to keep your eye on a lot of kids but, don’t worry, other kids will usually ‘tell on’ the kid who didn’t follow the command correctly or followed the command when “Simon” didn’t tell him to.