Thanks dramarama! It often feels like for every problem we solve, three more pop up, so it's just a case of keeping our heads above water with it all!
eeehbyegum, well, it depends on the age of your DC, but one thing that's worked really well to keep mine motivated with schoolwork is to use reward charts - they get points for doing a certain number of homework tasks and those point convert into their pocket money - it only works for my DC when they've already established exactly what they want to buy with the money though as they're not motivated by money in itself. My DS especially gets obsessed with his reward and is then happen to do whatever it takes to get it!
The other thing I've been doing with my DS is trying to replicate the support he'd get at school as best I can - so for exams, he usually has a prompt person in the room to get him back on task when he starts daydreaming or gets distracted (happens constantly!) so I know there's no point in leaving him to get on with his work as I'll just go back in to find him deep in research for his computer games. So I've been keeping him on task (it's been like whack-a-mole with all three of them!).
And I've also been scribing for him and reading each question out loud, as I think this helps him to process it - he's actually really bright and has all these amazing ideas in his head, but it's so frustrating as he often says 'I don't know' as he's scared of saying the wrong thing. So I would say 'right, what techniques does the writer use in paragraph 3 to create effect?' And while he's fidgeting and rolling around on his bed playing with a Rubik's cube, he dictates some really insightful answers that I can type up for him - it's a shame that can't be replicated in school, really!
I also find a strict morning routine is working really well for us, so we don't have to even think about what comes next - we just do things in the same order every day.
Oh, and part of the routine has been checking the DC's emails from their schools - and being strict about adding anything arising from the emails to their 'to-do' lists (I write them) rather than getting distracted by the content of the emails and losing an hour to some random task (I always do this myself at work too). Documenting tasks to do later really helps me to put them out of my head while giving me the comfort that I won't forget them!