My DS15 has just started year 11 and already my heart is on the floor and I am mentally exhausted.
He has Dyspraxia but that is just an element of the problem. He just can't be arsed with school and although we have been lucky enough for him to go to a small independent school that can cater to his problems and does their best to work with him, nothing is coming from him.
His father (we have been divorced 9 years) is pretty much useless and alway has been and focusses solely on his career, at best you could describe him as a Disney Parent, it's always been this way, it's just me that focusses on DS and helping him to do his best at school.
I guess that is the problem, because I am the 'bad guy' whereas he gets to do all the fun stuff with his dad.
DS is quite immature and also lazy and I know part of that is being a teenage boy but I look at everyone else in his class and how seriously they are taking their school work and I could cry because I have to drag DS kicking and screaming to do anything.
This weekend his father was working and would only be able to see DS and DD on the Friday and if not then, it would be at least two weeks before he could see them again, so I made the agreement that as long as he made sure DS did his homework, I would drive there and back and get them on the Saturday. This meant that my Sunday wasn't filled with the inevitable screaming and shouting match to get DS to do his homework.
I drove yesterday and with roadworks it took me the best part of 3 hours (it's normally an hours drive).
Turns out his father hadn't bothered to make him do his homework.
So we had the screaming match today 
DS is supposed to be moving in with his father after this year but again it was me that found out about courses, contacted colleges etc - his father says he will do things but doesn't bother.
My relationship with DS is awful because I'm constantly on his back, frustrated that the notion that he needs to put some effort in NOW doesn't seem to enter his head.
I know a huge part of the problem is his father but it's me that goes to all DS's SENCO meetings, me that drives him to and from homework club, me that gets all the phone calls about how DS isn't making any effort etc.
I suppose I just need somewhere to vent.
I read all the threads on MN from parents worrying that 10 A*s won't be enough for Oxbridge. I'd fucking love to have that sort of problem.
I just want a son that tries rather than the surly, lazy, rude boy that can't be bothered to make the effort.