To get the attention of the whole class I will ring a bellhop bell and they
immediately put both hands on their heads. They also know to look at me and
stop talking. Why put both hands on their heads? They will have to put all
art supplies down to do this and I will have their COMPLETE attention. When I
see them do this I'll make a big deal out of it and might say, "I just love
how you remember to do this!" And I will always thank them. It's like a game
for them and it works! (Simon says?) With a 20 minute kindergarten class I
have no time to waste. I do this with grades 1 and 2 as well.
Hope this helps.