C.J.
I had a biter/hitter combo - at 16 months they really don't know it is wrong. What they do see is they get attention (even negatvie) and they do not truly understand consequenses. or that because they bite they are being removed from play (it is about four years old for that development milestone to truly be acheived and even longer for them to think through their action to understand that if I do x than y will happen).
I have shared on the forum that my child care center director actually came to me and said, we do not kick children out - what does that accomplish - nothing.
Instead the director and a second teacher observed the classroom and noted what took place right before or during a bite/hit situation. after observing a week they came up with solutions to deter the situation before it occurred - hands busy with playdough, reading a book with my son in the lap instead of on the carpet, recognizing frustrating situations,e tc.
Also, it is unacceptable for punishment to occur in a child care setting - even time outs. I hate to be so harsh with this statement, but having seen what a true professional can do, I don't see that professionalism and knowledge here.
You may need to find a child care facility with more educated and knowledgable staff (look for folks who have CDA staff and administrator's credentials).
If all they know how to do is time outs, they are not effective instructors in my opinion.
Oh BTW - my biter/hitter curbed his actions within two weeks with the new approach and he is now almost 4 and we have no issues with his behavior AND we don't have to use time outs or threats:)
Hang in there!!