Why make the call?
I understood that my son was outraged at what he saw as an injustice. I also have a strong sense of justice and get very upset at abuses of power. Though I am not quixotic enough to believe that calling the school will result in getting the teacher to change his methods, and I certainly wasn't looking to get him fired, I still had to do it to register my protest. Yesterday I called my kid's school to speak to the principal. He wasn't in, so I left a message on his voice mail. He didn't call me back.
Did I accomplish anything at all? Yes, I did. The principal got the message, which he played for my son when he called him in. Even if what the principal told him made no difference to him, at least he knows that I did my part. And that is something -- for a child to know that a parent is on his side. A response to injustice should go beyond a resigned "well, what can you do?" See http://kallahmagazine.blogspot.com/2010/12/divrei-chaim-time-to-cry-out.html
Visit my site www.kallahmagazine.com -- not just for kallahs. You can also see posts at http://www.examiner.com/x-18522-NY-Jewish-Bridal-Examiner