T.L.
My 3 1/2 year old son recently went through the same type of thing--pushing, light scratching, sticking his tongue out--& we've come to the conclusion that it's probably him "acting out" about the fact that his two of his preschool friends (in a very small group) have moved on, plus there are new children in their places. Our preschool leaders are great communicators and very cooperative with us, and together we came up with a very simple approach of just being slightly more firm when catching him and telling him this behavior is unacceptable; this was paired with putting him in timeouts where he was separated from the others and told to sit for a short time, the issue was briefly & firmly covered again afterward along with the fact that the same punishment would be issued if it happened again. Something our preschool leaders also stressed to us was to avoid covering any issues that happened at school again at home, leaving school at school and only addressing the incidents that occurred at home--this seems to have been pivotal. Another thing we agreed on was that spanking was not to be used to disciplined this behavior because we felt that trying to use that to curb aggressive behavior would not help him internalize that physical aggression is unacceptable, that it would only confuse him and perhaps worsen the situation. I'm relieved that it took less than a week from the time we all agreed on the approach to see this behavior disappear. Good luck--I know how agonizing this is, but you all must draw on your patience now more than ever. Losing patience with him will only make him feel worse, and clearly he is feeling some kind of anxiety about something.