See Post 49 in this thread.
Your wife must have been represented by the wrong teachers union. No teacher in my area does any work for free — including meetings — unless they want to work for free, and most of them don’t and won’t.
With that said, according to your post, your wife worked an extra 2.5 hours per week to attend meetings and perform other non-teaching tasks, without compensation. That adds up to a 7.5 hour work day, even though teachers don’t actually work the entire 7.5 hours. BFD. Although teachers want us to believe that they are professionals on the same plane as medical doctors, dentists, lawyers, accountants and engineers, they are not even close. Their training is not as rigorous, and I don’t know any medical doctor, lawyer, or CPA who worked less than sixty to eighty hours per week or more during the first 15 to 20 years of their professional careers. Even now, near the end of my professional career (10 years after most teachers have retired to the public dole), I still work fifty hours per week or more. Vacations? Sure, we take them, but I can’t recall ever taking a real vacation where I did not work at all, particularly with the advent of notebook computers, email and cell phones. Indeed, anyone who owns their own business with or without a professional degree, probably works more than a tenured teacher for a lot less money based upon the hours worked per year. You can spin the teaching profession any way our want, but the reality is that tenured teachers are part-time employees, who earn full-time wages and benefits, in a system that rewards mediocracy.