I disagree about the whole 3 weeks of the 6 weeks being taken up with prepping the classroom etc.
An experienced, capable teacher does not need to take 3 weeks doing that. I know many teachers and they are extremely good at their jobs and due to their school's joined up planning ethos, the teachers all share planning and re-use each others' plans etc.
I don't disagree about the staff meetings/parents evenings etc but I think if a school is ran effectively and has a sound management team, it can be a good work/life balance for the staff.
And we all know how they copy and paste the reports; last year, dd even had someone else's name on her report. Her teacher looked so embarrassed when I said "I think you forgot change the names when you copied and pasted 'x's' report into dd's
."