Well from my experience most children will do what you expect of them....if you set high expectations, they will try to meet them.
But I also don't think all children should be mixed together. The ones that are struggling not only get frustrated being around those that do well without trying which results into a child that is embarrassed and won't try, but it also holds the other children back and slows their progress.
Grouping or tracking to some degree is beneficial and the politically correct mixed reading groups and classrooms has done nothing but frustrate those that struggle and create a very boring slow environment for those that excell.
(The worse possible example I experienced was main-streaming. Children with fairly severe learning disabilities were main-streamed into the regular classroom for subjects such as Health, Career Choices and so on. Most of these kids couldn't read on a first or second grade level, but they were put into a classroom with at level sixth graders and at level text books. The idea was to raise their self-esteem by putting them with the rest of the kids. The theory was nice, but it did exactly the opposite. They soon figured out that they couldn't do what the other kids were doing. They would get frustrated and bored. The other kids would get frustrated and bored when I took time to work with the LD kids or explain something in more detail so they could understand. It was a nightmare and a complete failure. They felt normal and safe grouped together with kids just like them. They may have suffered some stigma at times, but most of the day, they were safe and happy. Main-streaming was horrible.)
Not all children learn at the same pace or the same way. I know that some like to believe that the children who excell will be the example for those that struggle...they will some how rub off on those that struggle. But from my experience what you end up with is a class system that is created by the kids themselves. You get a whole group that struggles, gets frustrated, quits, and starts acting out. Then you get a whole group that feels superior, gets bored and starts acting out.
There are many subjects in which kids can be grouped together like art, music, p.e. and so on. But as far as reading, writing and math go I think grouping works well because the kids feel comfortable and the teacher can work with the group in a way that's best for them.
Now if what you are discussing is not at all what I've addressed, I apologize. I worked with middle school age children from all over the country that brought to the table all sorts of educational trends. I wasn't impressed with most of them. For some reason educators want to fix what isn't broken. They want to improve on models that work. And thus we end up with psycho-babble, politically correct, feel good, positive attitude geared programs instead of schools in which children are taught and learn.
I am not from this area either and though I'm not completely happy with the curriculm my six year old has been subjected to I don't think it's wrong to group children or track their progress and abilities?
Like I said though, I'm not trained to work with little people. I don't know all the lingo. I come from a long line of educators that work in various states and I have discussed with them various trends and techniques.
I'm not sure how a teacher can address a child's individual needs if they don't know at what level they are working.
I feel my child has wasted an entire year of school working on curriculum that she already knew and thus has really grown to dislike school. Though her school did access her to a small degree, they didn't do a thorough assessment and they refused to address her needs for advancement because they just don't do that. I was told she was an average student and I knew better. They did the same thing with my neighbor's son. I tested both of them with tools given to me by an aunt and against curriculum guidelines I got of the net for the state of Illinois.
At any rate, after all that rambling, I'm not sure that the school would even give creedance to your concerns. From my experience they will patronize you, but continue in the way they do things. Maybe I should have been insistant that my child be fully assessed at the beginning of the year, but I didn't and now I regret it.
The teacher has provided good instruction, but all the children recieved about the same instruction on the same material and my daughter grew bored pretty fast. It wasn't until recently (about a month or two before the end of the year) that she actually started bringing home new material.
You could try talking to them, but I'm not sure that you will get very far. You might consider looking into private schools which is what I'm doing.