As the husband of a teacher, I have seen and heard it all. Way too much, but that's another story.
First of all, the statistic of the teacher-student ratio is very misleading. For the last few years, the class sizes have been increasing, and the only new teacher/aides which have been added are basically special ed. Most of the time, her classes have anywhere from 23-25 students. These classes are filled with every imaginable type of student - from the highest achieving to the ones who just don't give a d***. Those who don't care are usually the ones who come from some of the most desperate situations at home imaginable.
So, in my wife's school, you have about 1/3 of the students who are extremely difficult to handle and educate - primarily due to the "parents" who created them. Many are being raised by grandparents, because the parents refuse to provide a decent environment or aren't permitted by law to have them in their custody. Lots of emotional problems, as well as learning problems. In the past when there was an unruly student, there were ways to actually try to do something about it. Not now....the teachers' hands are tied. So, day after day, the classroom becomes a place where a large percentage of the time is spent on managing behavior, thus hampering the education of the students who do try and actually care. Now I realize this is not true in every school, but times are changing, people, and it's not a pleasant thing to deal with. This is not just true in our state, but in many areas. It is particularly true in elementary schools, where expulsion or reassignment to alternative situations is simply not done, unless a weapon is involved.
As I said, it wasn't always this way....not when I went to school, and not when she first began teaching. All of society's problems and ills are right there every day for seven hours, five days a week. And except for doing the very best they can, the teachers have become frustrated and see very little light at the end of the tunnel. So, to insult them, and refuse to at least pay them for dealing with problems which they didn't create is throwing salt in the wound. The local control has been taken away from their counties, and even the state has lost a lot of control because of manipulation from the feds.
Merit pay is an interesting concept. Basing it on test results is laughable. Frankly, you can't get blood out of a turnip. Perhaps if it was based on a socio-economic scale of what kind of students they were teaching, it might be more accurate. Private schools and charter schools do not deal with this. The "problem" and non-conforming students are not accepted or simply removed from the schools.
My wife has taught with a few teachers who should not be in the classroom, that is a definite. Also a definite in any profession. Most of those get filtered out along the way, but there are some who hang on to the bitter end, just collecting a pay check. That is frustrating to the teachers who do what we all expect. But, the vast majority are not like that at all. When my oldest daughter considered being a teacher, we both told her that was not advisable for her fiscal or mental health. She wisely took our advice. I do know that there aren't too many jobs out there with the stress involved with teaching. And if it is a high pressure job, they are amply rewarded for it.
As most parents who volunteer and spend time in a school will tell you, they wouldn't do a teacher's job for any amount of money.
And, by the way, the three months off thing.....not accurate at all. In my county, the students start school near the beginning of August. My own children, who are all professionals, have vacations ranging from four to six weeks, and that is at this point in their lives. It will increase as they grow older. And all of them make salaries which range from $80,000 to over $200,000 a year. None are over 38 years of age, so their salaries will only increase. Not so with my wife, she is at the mercy of a petulant legislature and some tax-payers who feel she is making quite enough. If the tax payers want the public education system to survive, they need to wake up to what is really going on.