My suggestion is to read her to sleep. Get her totally ready for bed, pajamas, teeth brushed, everything, then climb into her bed, covers up, lights down except one night stand lamp and then cuddle and read together. As their reading skills got better we would let the child read the voice/s of the character/s in the books. This encouraged reading skills, self-confidence and is such sweet bonding time for all of you. And also, it signals the body to relax get comfortable and allow the warmth of love mixed with being under the covers and the sweet imagination triggered by the book to signal the body that it is bedtime.
If that doesn't work or isn't possible, I let my kids read in their beds by themselves, the rule is they have to be lying down under the covers and could read 10 pages to one chapter, then try to sleep for ten minutes, then if they weren't asleep they could read 10 more pages or another chapter and then try again to sleep for 10 minutes. (The page length varied on the speed of the reader, the length of the book and the number of words per page.) They were never able to go more than 2 cycles of this and they would fall deep asleep.
The last tip that we love because it is natural and really, really does help in helping the kids to relax enough so they can fall asleep is Hyland's Brand -Calms Forte for Kids. You can get it at almost any health food store. They are lactose based very small tablets mixed with chamomile and other relaxing herbs from nature. They are small and you put 3 into the cap and toss them under the child's tongue so they dissolve easily and go straight into the blood stream to act fairly quickly to help my kids relax just enough to let the sleep they need come and take them to ZZZ-land.
On nights I can't sleep I do these same tricks and I get the sleep I need too.
She is probably over tired and at the same time not wanting to miss the exciting activities going on around her, and she is young and not able to say I really enjoy watching this movie and being awake around my grown-ups, but I think it would be better for me tomorrow if I go to bed now and get the sleep I need. You get to teach her that she is a nicer person and a better learner when she has the right amount of sleep for her body.
By the way, good for you for going to school! What wonderful role-modeling you are giving your daughter. Keep up this hard work, it will make a difference in your life and in hers.
Good luck.