landofsoapandglory - "if you have time off for appointments you have to make it up or take leave." This has never been the case for me in any of the sectors I've worked in the few years. Providing you are not taking the piss and these appointments that need to be booked in working time, appointment time is appointment time - fully paid and doesn't have to be worked back.
Presumably the school is in full possession of the facts unlike the parent posting on here. It's not for us to judge whether the teacher's time off is justified, that is the role of the school. Getting time off from work as a teacher can be incredibly hard and subject to scrutiny unlike any I have had to endure in my own profession.
Another thing... if someone had posted on AIBU staying their employer was being difficult about you taking time off for appointment time for your child, would you think that is a right and fair thing to do?
Just because a person has chosen to become a teacher, does not mean their lives are 'owned' by the parents, that they have no right to a personal and private life, that they have no right to have children and commitments outside of work..
It sounds like the OP is unhappy because the teacher didn't organise her life around her - how dare not provide extra lessons to her DC, how dare she not organise parents evening times around her and her husband's plan, how dare the teacher have an imperfect child that has behavioural issues..
And I am meant to believe it is the TEACHER that has the problem?
Seriously, any behavioural issues need to be brought up with the school, not on MN. Any requests for extra help need to put into the school, if they can't help pay for a tutor for your DC. It's absolutely non of your business what the teacher does outside of school, "No doubt the teacher will be giving her child extra help outside school" just smacks of jealousy. I can tell you the friends I have who are teachers would LOVE to spend hours giving their children extra lessons, but they spend so long planning, admin work, marking they actually have VERY LITTLE time to spend with their DC's. They spend most of their life helping other people's children. A fact that the OP is seemingly oblivious too.