I'm not saying teaching is easy, I know I couldn't teach a bunch of screaming kids that want nothing more than lunch and to poop and pee in their pants and then tell others to clean it up. I respect teachers and know that a good teacher is worth their weight in gold. If they want to complain about being under-appreciated by their supervisors or administrators as a whole, I think that is fine and probably valid in most cases. Also, for the value a good teacher provides and the money they make, it's a shame. However, a bad teacher should be paid just about nothing, and due to unions, there is no way to really reward merit anymore. I'm sure every single person without a moments hesitation can tell you who the best school room teacher they ever had was. Coincidentally, most people that went to that same school would probably choose the same person. Now think of your least favorite teacher...depending upon how long you've been out of school, probably a bit more difficult...as the worst teachers are those that leave absolutely no impression in their students, and most likely no additional knowledge.
"Get off of your high horse stupid."
Lets get back to the main point. The one thing that I can't stand them complaining about is their schedule. Yes, we weep for you that after 2+ months of doing nothing, you have to go and work for the next few weeks, most of which are a full 5 days! Be thankful for the time you get off and don't whine about the 180 days a year you have to work.
If you see a teacher complaining, simply point them to this article as a more polite way of just saying they shouldn't be so ungrateful for the world's best schedule! You can pretend you had no idea what this article was about and the title was misleading.