My daughter's kindergarten class has 6 girls and 13 boys, full day. The teacher even said this is one of the most energetic class she has ever had, she has been teaching for almost 20 years so that is saying a lot. She gives them 3 recesses/gym times, a lot of reminders on how to act and treat others (obviously if
My best advice is keep talking to your son, help him figure out a better way to deal with what is going on. You call him sassy and a smart mouth, well that can lead to agression if he is egged on and is not strong enough to ignore what the other kids are saying/doing. I am sassy and when I was a kid I got myself in A LOT of trouble because of it, of course I was a girl so usually the boys were sent to the principal while I got a stern 'don't do that' talk. Say someone calls him a name, he gets sassy about it but the other kid does not stop, your son is thinking how do I get even with this kid or make this kid stop, get pyhiscal. Make your son strong in telling him it ignore those kids, do not respond if the other kid does something or says something he does not like, walk away if possible, if your son gets hit or bad names thrown at him tell him to tell the teacher and do not take matters into his own hands.
Taking away things for this bad school behavior is not going to help, it will just make him angery and mad at the world. My guess is a lot of the times the other kids start it, your son is responding just teach him the correct way to respond (ignore the other kids, walk away if possible, if hurt tell teacher). If your son is starting it teach him how to behave at school (no touching others, no name calling, no bad words, listen to the teacher, obey the school rules). On the days he does not get in trouble be proud of him, tell him your are proud of him, give him a big hug and tell him how happy you are that he did not get in trouble that day.
Seeing the school psychologist does seem a bit extreme at this point. I think that sitting down with the teacher and creating a game plan first is a better way to handle the situation. What does the teacher see (you son starting it or you son just responding to something), ask her how she/he would like your son handle diffcult situations (usually it is come talk to teacher), let the teacher know you are also re-enforcing the school rules at home by implementing some into your home rotuine and reminding son what the school rules are and how he should handle the different situations. Also maybe ask if you can be a mom helper in the room if the teacher feels that the class is too much to handle (ever year the type of personalities change, some times everyone gets along while other times crazy conflicting personalities makes the class hard to handle).
The kids are try to figure out at this NEW age and NEW classroom how to co-exist with each other. It is a tough age and preschool and kindergarten teachers really are angels if they can handle of of the ever changing emotions. To me if there are more then 18 kids a helper is really needed at this age, so offer to help if you can.
There is a boy in my daughter's class that really is a high energy kid type. We had 'fun friday' day this morning, tons of messing painting, snacks, shaving cream and so on things for 2 hours (there was a teacher and 4 mom helpers). Well this one boy was not behaving (more like wanting to do his own thing, not waiting his turn and pushed another kid so he could go first) so the teacher had him sit/play by himself in an area in the classroom as to not create chaos for everyone else. After about 15 mins he felt bad he was missing everything but the teacher said the only thing he could do now is play with the playdoh (my table) and I could tell that you had to talk to him & get his attention differently. He was at my table for 1 hour while the other kids got to come and move on about every 15-20 mins. He missed every station but mine, he was sad about that, I asked him if he knew why and he explained what he did. From there I said you know what there will be another 'fun friday' day so you will get another chance to do things if you follow the instructions. He smiled and then I spent time with him on making a playdoh lizard, which turned into every kid wanting to do that so I was busy.... but because I took 15 mins to focus on just him and talk through the situation with him he realized how to handle himself better at least for that day. So with that I think teachers really need to focus on what a child needs to learn BUT I also think that the parent has to do a lot of work at home to re-enforce and help your child handle the situations better. A teacher can not always be dealing with just one kid all the time, there is a whole class to teach/look after, yes they should remind but after 2 times in a day I think the teacher has ever right to put that kid in a "time out" or send to the principles office.