Having our kids as part of the daycare is soooo challenging. You mentioned time outs don't work, have you tried the counting to three method of time outs? When he does something "bad", explain to him why he is not to do this, and that if he does it one more time he will get a time out. If he does the bad behavior again, count to three, at three if the behavior hasn't stopped, time out in a corner, or on a step for 4 minutes. I find this method works best. First couple of times is hard, but after you have done it a few times, you probably won't get to counting to 2 and he will stop. Works for my kids.good luck. I know it's hard.