ESL Football

Instructions here:

http://www.esljunction.com/esl_games/football-print.html

I have used this in small groups (with one or two players per team, plus a referee): Each group gets a board and ball; the referee gets a list of questions, plus answer key, and monitors whether the teams are answering the questions correctly. This way, you can have three or four small groups playing independently, and you can walk around helping them.