good luck with it all- I guess it is up to you whether or not you say anything or not, if it were me I would probably say something, even if it is just about the way she spoke to your DS, as if she speaks to him like that, imagine how she speaks to other kids in the class.

The thing that astounds me even more, is that if he is only in kindergarten, then she is expecting way too much from him- it is not untill late pre-primary early year one that children are really expected to start understanding about counting and collections.

My advice for looking for a new school is to ask about what provisions are made for kids with potential learning difficulties before choosing where to enrol him. I hope that you find someone to who is able to help, and remember he is only so young still, he is still learning how to learn!