Wildflower, you work with fairly troubled kids, right?

Do you think they would be up for trying some relaxation techniques? Tell them about how you think it would help them calm down... and let them know that you would enjoy it as a way to just have everyone, including yourself, relax and get their minds a bit more clear for the day. I've done that with my class a few times - led them through a few breathing exercises. But they're grade 4 and mostly a sweet group so they went along with it no problem.

If your group was up to that (and of course, they might not be, but you can still at least always try) then have a few minutes of breathing exercises when they come back into the room from being anywhere else. It might help you out a bit too.