One of the biggest problems public education has is what to do with the disruptive student. Ask any teacher and they will tell you that they are spending a heck of lot more time with the disruptive kid than on educating those that want to learn way to often.
Private schools deal with this problem but just sending the student back to the public school, but public schools do not have that option, they have to try and educate kids that are unmotivated and do not want to be there.
I always looked at it from a coaching perceptive, if I spent the majority of my time coaching the bottom 5 players on the roster to get better, every parent of the kids that had talent would raise hell about why I was not coaching the kids to be the best team possible and that their kid was wasting a year. That is what we are dong currently in education, wasting valuable time and resources on kids that do not want it, could care less about an education and do not want to be there. While others that do want to learn and get better are many times left to understand the assignment, because I was again dealing with little Johnny here that is bouncing off the wall. I hate to say it but as the kids get older you either have to remove them from the classroom, or tell them to just sit there so the other kids can learn. You are not going to pass, but I am also not going to give you grief about not turning stuff in. It sucks, but we as educators are there to teach, not play baby sitter.
I commiserate with the challenges in public education, but as a parent of one kid who was an honor student and in AP classes and another with mental and physical challenges and ADHD (so yes, on occasion he is bouncing off the wall), I have to say that giving up on kids that have barriers to education is not the answer. Yes we need to find a balance but giving up on them is not part of the equation.
My son needs a lot of help in some of his classes. We try to give him as much as we can from home. However some of his teachers make it very difficult for us to help in the instruction of our son. On-line parent tools have out of date, incorrect information. We will check and find no assignments for a class then a few days later find that he has a late assignment that was assigned during that time period. The online tool for checking on work progress is worthless. It shows all assignments turned in and not graded as missing. Some teachers grade work right away, some will wait almost a week before it appears so if it really is missing you are way down the road before you know it - and frankly it is a guess since you don't know if all the other student's work is graded and your kid's is missing or if it still isn't graded. (And what happened to returning graded work to students? Isn't part of grading work is so that we can learn from our mistakes? Feedback of "you got 1.2 out of 4 on this assignment" is next to worthless.) Executive functioning is one of the areas that my son struggles with as part of his disorders. If the parents aren't given the tools to help him organizing and keeping track of his work then that tells me that the school and teachers plan to help my child with that as laid out in his IEP.
This isn't a kid who doesn't try, but some classes with certain skills are extremely difficult for him. Others come a bit easier and in some he actually excells. In fact, he won a math award - one of only two in his entire high school - for last academic year in a pretty large high school.
It is clear to us that a few of the teachers at his school have put him in the category you seem to be putting some students in. Maybe that is fair for some students that don't care and don't try - sad but fair - but for a kid that just needs the extra help to succeed and has proven s/he can and has with help, don't shut parents out who are clearly trying to help you help their kid.
And why the hell aren't we giving those kids grief for not getting assignments done? Send a letter home every day if you have to. It can be a form letter where you just fill in the blank of the missing assignment. Not all do, but THERE ARE STILL PARENTS WHO DO CARE!
Don't get me wrong, the majority of his teachers have been great. He has had a couple of Special Ed teachers who are my heroes, including the one who is his current sports coach. But giving up on kids because they are "bouncing off the walls" and assuming that means that they don't want to try to learn hits a nerve with me.
/RANT