My DD told me that there were a couple of girls that were picking on her at daycare. These are older kids 6/7 age, it's more of an after-school program than daycare. Anywho . . . I'm was not surprised to hear this, I know the aforementioned girls and had the displeasure of coaching them in little league soccer

What DID surprise me is what DD told me next, that her teacher told her to "go over and knock over their castle." (Apparently they were building a large castle out of legos/blocks.)

I'm not a "I'll-show-them" "get-them-back" "eye-for-an-eye" person. I have found that having an attitude like that usually escalates the situation rather than diffusing it. I want to teach my kids to take the higher ground. I am perturbed that the teacher encouraged DD to be destructive and aggressive towards the other girls.

Do I talk to the teacher about this?

I talked to DD about it. She was pretty upset and confused because she was only "doing what her teacher told her to do." I explained that sometimes teachers are wrong, she needs to think for herself, ask herself if what she's being asked/told is the RIGHT thing to do.