Teacher shaming 4 year old son. How do I proceed?

The title says it all. My son's teacher has been tackling my son's "behavioral issues" somewhat inappropriately. The first talk she had with me concerned my son's tendency to make faces. I'm not talking about rude faces like sticking your tongue out...more like pretending to be grumpy or embarrassed. It's something that I've never given much thought, people make comments about him being a little actor or comedian. This is the first time that someone has had an issue with it. She basically insinuated that he was being disrespectful.Her second issue with my son was him putting blocks in his pockets from his classroom. Now don't get me wrong, I'm all about him being reprimanded when he does something wrong. But the way she dealt with it was, in my eyes, uncalled for. When I arrived at school to pick my son up, he got up to greet me but she stopped him in his tracks. She told him in a sharp voice to sit down then turned to me and lifted a little block and angrily said that she'd found it in my son's pocket. She turned to my son who sat there in his chair looking sad, she told him not to make that face and that it wasn't going to work on her, and how would he like it if she came to his house and took away his favorite toy...etc. She proceeded to tell me to confiscate one of his favorite toys at home so he'd understand what it felt like. She said this all aggressively. The negativity was coming off of her in waves. Hours later I'm still in shock over the level of animosity this teacher could have towards a four year old boy who put a ratty old block in his pocket.I do not think that what he did was ok, but the way I approach these situations is i ask him nicely to put it back because it isn't nice to take things that don't belong to us, I don't care how many times I have to say it to him, it'll get through eventually. But shaming is not an option.I don't know how to approach his teacher without setting her off. I want to send her an email, but I'm honestly at a loss for words.Thank you in advance for your help. via /r/Parenting http://ift.tt/2xYPDVC