Quote Dawn Andersen-Lux
Playing "Loud or quiet" is a good way to grab the attention of younger children, teach behaviour-related vocabulary and, at the same time get them to let off steam.
That's always a great focusing activity
Here is a podcast on teaching children and there's some info in there on crowd control ESL Teacher Talk » Blog Archive » Teaching Children vs. Teaching Adults
Here's another one and the guest Richard discusses some of his methods for handling large groups and the game of the week is a 'game' to get students into groups. ESL Teacher Talk » Blog Archive » Getting ‘Genki’ With It