Well,
I am a bit overprotective, so take that in stride! I would want to go and observe the school day for a few days. I would have the teacher understanding that my sole purpose is to understand what is taking place. If there is a problem in school, it would probably be obvious to YOU his mama what that is. If you see it for yoursefl and work with him right then and there at solving it, your power has grown 10 fold over trying to create repurcussions after the fact.
You know, when there is a problem, you ahve witnissed it. You can pull you child aside and discuss the situation with him gently. Get him to a point where he understand it. He is a child, of course. We can't assume they see the obvious. I see parents do that "HOW COULD YOU? YOU KNOW BETTER THAN THAT! YOU DONT TAKE SOMEONE ELSES TOY! WHY WOULD YOU DO THAT! AAAHHH!"
Geez, I can't listen to that. You know, a frank conversation. This is why what just happened has caused a problem. How do you feel about it. What do you think so and so thinks, etc. A Coverstaion.
Then you give them the tools for a solution.
I don't know any of the details, but if my child were having a behavior problem in school, I'd want to know why. Are they giving him sugar at lunch? Is someone picking on him? Is he feeling insecure or disadvantaged? What's going on? Anything the teacher tells you is hearsay. You need to witness it for yourself I hesitated to say that right away until I saw that you do Pampered Chef from home. This indicates to me that you might have time to go observe.
I think he's stressed at school. Then when he comes home he's punished. Where is the happy relaxation and acceptance in his life? I could be wrong. It's hard to know unless you're in the situation.
Your doing well by caring enough to seek help. Good job Mama.