I don't have much to add, but wanted offer a bit of moral support. Hang in there and good luck.
I know what it's like to fight the school system, and it's a tough road to hoe. I also think some aspects of the No Child Left Behind act are actually making things more difficult in some cases and that contributes. The school are focusing so intently on keeping the numbers up on the testing, that actually teaching the children is becoming more like an assembly line than learning environment.
My daughter is severely ADHD, but was not diagnosed until 6th grade when she finally broke under the pressure and ended up hospitalized for 2 weeks for depression. My daughter has never exhibited the disruptive, active behavioral problems people normally associate with ADHD so it wasn't as recognizable. Our biggest issue was homework, she would come home from school, then spend the entire night working on homework..straight up until bedtime only to forget to turn it in, lowering her grade. My daughter is a very intelligent girl, on testing she's well above normal or average, but so much of the schools grading is based on homework she literally was a failing student. In my discussions with the school over this they took the stand that she just wasn't trying.
At first I was at least able to get her to turn the homework in late when she forgot, and at least she would get some grade for it, but one very cruel teacher destroyed that for me before she got through 6th grade. She was so intimidated by him that she had trouble even speaking to him without desolving into tears..so I told her to just set it on his desk when she went into the room, that way he would at least have the homework and she wouldn't have to actually speak one on one to him. His response to this was to yell at her in front of the entire class about it, telling her he didn't own the desk, she couldn't expect him to see it if she didn't put in directly into his hands, and he never wanted to see that behavior again. I mention this because this incident, has never left her to this day and created even more problems later.
Throughout Junior High, I was at the school so much I might as well have gone back myself. And each year we struggled with the same issues, and by the end of the year she would be failing so badly that they would put her on a point system and tally up the number of homework items she turned in, rather than actually grade her and pass her on that. A side note here, some of the homework she was struggling so hard on, was never even graded to verify the student understood, which made no sense to me, they didn't look at what was done, they just looked to see that something was done! Anyway..once she got into highschool things became even more difficult. I wasn't allowed to actually go into the school as much to turn things in as I did in Junior High, so even less got turned in. Which is when that incident in 6th grade reared it's ugly head.
My daughter as I said before has never been a behavioral problem in anyway other than forgetting her homework. But all of a sudden I found she was skipping classes. Not school...just 2 specific classes...which resulted in numerous detentions. They didn't inform me right away, and she hadn't mentioned anything about it so by the time we found what was going on, one of the classes was a lost cause and she was dropped from it. Afraid to turn her homework in late, fearing reprisal in front of the entire class by the teacher she just wouldn't turn it in, after awhile she started getting scared that they would yell at her for that...and started hiding in the lunchroom during those classes. I was able to get her through that year, but this problem returned again at the start of school this year and she was reaching a point where they were going to have to report this to the truant officer, which considering what her problem was....would have been very destructive. She already was feeling scared and intimidated she didn't need even more fear.
And then....5 years after I started this fight...a new teacher acting as her student advocate actually listened, and really payed attention and suggested an ombudsman school. It's considered an alternative school, mainly troublesome students which sounds bad, but it's practically a miracle for us. There is no homework, the work is done on a computer and the teachers are there to offer assistance, but the computer also grades the work. This eliminated our 2 primary issues..no intimidation and no forgetting homework. My daughter still attends her highschool along with this, so that she is able to take some of the elective courses. This was done because one of them is directly related to what she would like to persue as a career after leaving school. This class also has no homework, and now finally after struggling with the school for 5 years, my daughter is finally succeeding and her true potential is showing.
I hope you don't mind that I gave so much detail on your post about what I have dealt with, I wanted you to know that I truely understand the struggle, and also let you know where we finally found resolution in case it might help you if worse comes to worse. After struggling 5 years I know I wish someone had brought it up to me earlier
Good luck!