Before you start you'll need to make small pieces of paper with a range of secret words written on them. You can use any type of words you want but I find verbs are best for this type of game so that's what I'll be using in this example.
To make the game interesting you can have easy words (worth 1 point), medium words (worth 2 points) and hard words (worth 3 points).
Here are some examples of words I use:
Easy (1 point):
Eating, sleeping, running, singing, flying, cleaning
Medium (2 points):
Laughing, studying, looking, throwing, talking, cooking
Hard (3 points):
Thinking, pointing, lifting, climbing, opening
Split the class into teams and ask a student to choose easy, medium or hard. Give them around 20 seconds to act out the word in front of their group (while other teams stay quiet). Continue the process with the other teams while keeping track of the scores and see who wins!
You might like to let other teams guess the word if the original team are unsuccessful in their 20 seconds, giving them the chance to earn extra points.