Protect your son first at all cost. Here in the US we are currently dealing with the effects of bullying on young people such as suicide. I am a teacher and do not tolerate any of this behavior and nonsense. School should be a safe place where you can learn and grow both educationally and emotionally. Unfortunatly administration doesn't always back this up. Not just for your son but for other young people fight the fight. Press the point. Silence is acceptance. When bullies are confronted they are seen for the cowards they are. Intimidation is a form of bullying and that is what the school is doing. Yes I am passionate about this. It has to stop. And I see myself as a good place to start.