Have name changed for this, sorry if this is long:
I work 3 days a week; Tuesday, Wednesday and Thursday. ExH has DD on a Thursday but she’s in Nursery on Tuesdays and Wednesdays.
I am doing a degree with OU. On a Friday I put DD into Nursery again so I can get my work for my degree done. It works well, DD enjoys Nursery and still gets a day a week with each of her parents. I tend to drop her off slightly later say 9.30am so she has her breakfast with me and pick her up earlier at about 2.30/3pm on Friday as opposed to her going 8am-5.30pm on Tuesday and Wednesday.
I pay for all 3 of her days in Nursery with no help from ExH. ExH is in a low paying job and still lives with his parents. He pays me a measly £50 a month in Child Maintenance which doesn’t even cover 1 day a month at Nursery as he told the CMS that he only works 20 hours a week when he works at least double and that he earns bang on min wage when he earns 50p per hour more than that but I can’t prove it because he refuses to give his wage slips to CMS, and apart from that Thursday where he has her 8.30am to 5pm where I have to drop her with him and pick her up at the end of my work day (thankfully his house is on the way to work). He never has her overnight or for extra time, never at a weekend because then he can go out with his friends or work as he wants. On Thursdays he stays in all day, won’t even take her to the park or walk his parents dogs with her because he’s worried about what people will think of him being out with his DD – he never took her out when we were together as he’d say people where judging him and thinking badly of him. He has the same opinion about groups despite their being two local groups purely for dads on a Thursday in our local area (“Oh no I won’t like anyone there, they’re not like me” without even trying 
).
DD is nearly 3. We split when DD was 18m. You can imagine why.
ExH normally has no contact with the Nursery at all; apart from attending parents evening once a year. Although they have all his details due to him being named on DDs BC. He is welcome to contact them if he wishes for updates and he had their contact details, and them his.
At pickup yesterday the finance manager called me over and asked why I was considering removing DD on a Friday. I wasn’t. Turns out ExH contacted her and said he doesn’t want her in on a Friday anymore. When I’ve asked him he’s said he doesn’t see why she needs to be in when I’m at home. I’ve explained about my OU work and how I make it a shorter day, but would be happy for him to look after her on a Friday instead. No he says he’s working. But he doesn’t want her in Nursery, because I am at home and she should be with her mother.
AIBU to put DD into Nursery while I do my degree work? I feel it’s a good use of my time as it means on Mondays and at weekends I am solely focused on DD, but if MN think it’s a bad idea I’ll change it. Also means I don’t feel rushed or panicked about my degree work as I can 100% focus on it for those 5/6 hours.
So AIBU to not change how I operate for ExH? Or do I listen to him and take DD out of Nursery for that day?