Teacher is a Monster
This is a very short activity to lighten things up in the classroom and to get some giggles from your students.
Stick all of the flashcards onto the whiteboard and practice what they are.
Through your Teaching Assistant or helper, tell the class that you are thinking about a flashcard and they must guess what the flashcard is. For every guess, award a point or a sticker to the guesser.
When the class guess which card you are thinking about correctly, you become a monster and chase them back to their seats! Play three times, then move on.