My wifes a teacher, they do have to spend an absolutely mind boggling amount of time covering shit that really should be handled at home. Literally calling parents about their kids refusing to do any work and the parent saying "I dont know what you want me to do"
Just wanted to echo this as my experience too. It's unreal how many times my wife has to change her entire lesson plan for an entire grade because one parent wanted to complain about a non-issue while at the same time parents refuse to address real issues that disrupt not just their student but the learning experience of everyone else.