[lutorm]

Arrogance was indicated by the tone implying that you knew best... Of course taking an interest in your child's education is good, noone would argue otherwise. But second-guessing the teacher is another matter.

Of course there are bad teachers, just like in any other profession. But I'd like to think that I'm not one, and on the off-chance that you'd have a kid on those rare occasions when I teach something, I'd hope that your presumption is that I'm a competent individual, unless confronted with evidence to the contrary. (And your child scoring low on a test is not.)