Annette,
Another trick that worked for me towards the end of the year was to have the students setting and breaking records throughout the day for many different things. For example, if it is time to get whiteboards out, they not only give the triple repeat, "whiteboards, whiteboards, whiteboards", but use a stopwatch to time how quickly they have their boards out, markers ready, hands folded, sitting up straight in ready position. Or, time them to see how quickly they can put their supplies away, get settled in and ready after bathroom break, etc. I wore a purple stopwatch on a lanyard, and they were begging me to time them!
Try it...you might pleasantly surprised!
Deb Weigel