L.R.
D.,
I went through this with my 3 yr old son this past Fall/Winter, at his MDO. We all worked together and tried and tried many different things. One thing, for my son, he was not using his words to portray his feelings. We worked really hard at school and at home on using "big boy" words. The hitting was emotionally hard on me, MDO was the only place where he hit, he never hit friends any where else. We also worked really hard on; "Hands are not for hitting, hands are for loving." There is a book called "Hands are not for hitting" by Elizabeth Verdick. This might be of help. Anyway, by the middle of the Spring semester we had fewer and fewer incidences and the they finally stopped completely. It is definitely their age, but does need to be addressed. I, too, was worried about ds becoming a bully - but knew that was not it because he is a tenderhearted little guy.
Hope this helps. And may this phase end soon for you.