Yes and no. Obviously his teacher was in the wrong for yelling and screaming at him over such a trivial matter. However, in California at least, testing standards (as dictated by the state) are incredibly strict. More than one good teacher has been fired for not following the written procedures EXACTLY. Any reported deviation (state inspectors interview students and staff at random) is grounds for punishment and possible dismissal. It's a complete disaster, but this is what the teachers have to deal with. It can be incredibly stressful.