It sounds like you all need to organise your time better
OP has no problems organising her time - what she has a problem with is getting any time to organise! Her DH won't LET her work out a schedule - he seems to agree to watch the kids and then changes his mind because he's "tired" (OP never gets tired, obviously).
I've worked shifts, too - and yes, it is exhausting. But so is writing a dissertation, and becoming familiar enough with your material to do well in a Viva.
Plenty of people (most of them women) work shifts AND run a home, and do it for years on end. The OP is asking for a finite amount of time - I think it was 8 weeks - so that she can finish the degree that has taken her SIX years to complete.
SIX YEARS!
How many of us would want to throw away six years of bloody hard work for the sake of a few weeks? I wouldn't.
As Adora10 has pointed out - he had several hours sleep, got up for a couple of hours and then went back to bed until the afternoon. He's not being deprived of sleep altogether.
Spartacus has validly queried whether he could be jealous and resentful and I agree. I've also seen this - and it's not necessarily a deliberate thing. Some men, are outwardly supportive (and really believe themselves to be so), but inwardly just can't bear the thought that their wives/partners will get better qualifications or appear more intelligent and educated than they are. They don't have realise they're doing it half the time.
As an example: A friend of mine had a stroke in her forties. Her DH (who was admittedly a selfish arsehole of the first order) would make fun of her attempts to speak ("just a joke - had we no sense of humour") but despite that (and the fact that he, their two sons, and her father immediately expected her to go straight back to all of her housewifely duties as soon as she came out of hospital) she made great progress - she was very determined.
She decided to take an OU course in English Literature. She worked like a Trojan at it. She was the slowest in the class, and only just passing the modules, but she was doing it. Half way through hr second year, her H (having read her work) decided that he would like to get a degree through the OU as well. He decided to do . . . ENGLISH LITERATURE!
He then proceeded to get much higher marks than she had achieved, criticised her work content and grammar, and not to put too fine a point on it, made her feel like shit. She dropped out of her course. A few months later he, being "far too busy" also decided not to go any further with it.
The git.