CL for simon says game
In this well known TEFL game, students only do the action they are told to when the sentence starts with “Simon says…”, e.g. “Simon says open your books on page 27”. If they hear any other command, e.g. “Knock on the door”, they should remain totally still and not even start doing the action. To add some more useful language, you can replace “Simon says…” with “You have to…” or “The teacher wants you to…”.