This is a game for reviewing some vocabulary items. It works well for the last 5-10 minutes of the class. You can divide your class into groups and set the procedure. Then, you can appoint a student to take the exact time and count the correct answers. No repetitions! Later, volunteers come pick up one slip and give it to you. You read the statement, for example "Name as many wild animals as you can in 20 second!" The group which name more words is the winner. Hope it works well in your class.