This post from The Fordham Institute says exactly what I was trying to say in this post.
You can’t principal-proof a school: Why top down evaluation systems are doomed to fail
A school needs a great leader to rise to greatness. No amount of micro-managing on the part of parents is going to change that. If you find your kids in schools that have systemic issues you need to find a different school. That's why school choice is so important in my opinion.