I agree with so many posters in that there is not one specific problem to point the finger at. "Back in the day" there was no such thing as mainstreaming, for sure. I'm certain this affects some of the situation. I do also agree with Diane below... as a former preschool teacher and nanny, in the 20 years I worked with kids, parenting has experienced an enormous shift philosophically. There are a lot of parents out there who are hesitant to give a firm 'no' and a consequence. She's right about the kids without bedtimes or rules at home. One mom told me that she never put her child in time-out because then the child would tantrum. Heck, I had parents who didn't experience enough sense of authority that they could tell their kid "No, you can't wear that to school" or "come back here and clean this up".
Honestly, instead, over the years the conversation went from "how can I teach my child to follow this direction" to "how can I make the teacher adapt to my child's misbehavior that I have chosen to indulge and justify to myself"... sorry, but it's true. When parents are asking me what to tell the teachers about how their kid needs this and that-- when the 'this and that' are things we all *just did*, like following along with the teacher's directions or standing in a line or not hitting, etc.etc. etc. It's utterly ridiculous. I know one parent who wanted to know how to tell her son's upcoming kindergarten teacher that he had a hard time with finishing activities and that she should take a picture of what he was working on when transitions occurred... This is totally why I got out of this sort of work. Even as a nanny, some families wanted me to cook three separate meals for their picky eaters for each mealtime. ugh.
Knowing this, and volunteering in my son's classroom, I can see how a teacher can have so many 'behavior' issues. Maybe there's one boy with impulse control issues, who has a hard time with conflict--- AND there are three other boys who have a dynamic of saying something mean to this child to provoke him (knowing he does not have a lot of impulse control, and I believe there is a clinical issue with that child, although the teacher has never discussed this). Now we have FOUR kids who are more or less misbehaving, one organically, the other three primarily to get this first into trouble. Or the kid whose parents give them lots of validation for being upset. Man! This kid gets upset about every.little.thing. and goes to tell the teachers, expecting them to give him that same attention and validation as mom and dad do-- OR he screams at the other child he's upset with. Or you have two kids that just bring out the worst in each other.
One mom recently asked me why the kindergarten and first grade at the school don't follow Vivian Paley's "You can't say you can't play" philosophy of inclusion. I replied that some of these kids need a break from each other at recess and need to be able to say "NO" to that kid. Instead, some parents want to take that option away and make it all touchy-feely preschool style, where inclusion is encouraged to the point of being forced. (kind of the same "you must invite the whole class to the birthday party" because no one wants their child to experience disappointment-- even if their child is excluded just because they are not actually *friends* with that kid.) At school, they may have a pesty kid in their face for nearly 6 hours a day. Imagine being trapped with a co-worker who behaved this way and then seeing them in the staff room.... you'd be eating lunch in your car on a daily basis.
My son's kindergarten classroom is extremely well-managed. I have a high degree of respect for his teacher and her classroom skills. However, some parents have complained about her expectations for the children and their behavior. They feel that because she is not understanding (read: accommodating) of their child's acting out or misbehavior that she is the problem. Nothing could be further from the truth. However, when a parent allows laxity at home, no rules, bends to what they perceive are their child's 'needs' instead of perceiving them for what they are: desires or proclivities-- then yes, there is conflict. She is trying to teach the kids to get along in first grade, not extend preschool. She would not be doing most of the kids in that group any favors by treating them like they were three and four.... but that is what a few parents would prefer, I am sure.
There are kids who do toe the line and they need a clear choice "you may stop hitting each other or you will both be moved" but they willl shape up quickly; there are dreamy kids like my own son who some days needs extra guidance to complete a simple task--not because they have a clinical issue, they're just in their own heads, and I know that this contributes to more work for the teacher. (and boy, we are working on this at home!) One child dresses inappropriately for school sometimes and needs reminding to keep her sweater on all day to cover up... it's stuff like this that she's addressing constantly.
I'd be frazzled at the end of the day, too, if I was the only person providing clear guidelines and rules in some of these kids lives.
Sorry this was so long-- I just can't see, though, how continuing to blame teachers for what Dawi so eloquently and succinctly pointed out are adult/parent responsibilities which need to be addressed at home as well.... well, it's not progressive in any case.