PigtailSam she can remove an iud if she wants to. (At least I think they can be removed).
She could get it removed if she wants, but my understanding is that you would need to go to the doctor for that, so it isn't something that she could do on the spur of the moment. It might depend on the specific model though, so that would be something to consider when evaluating the option.
PigtailSam But it does seem worse to me forcing her to take birth control.
Is she opposed to the idea of taking berth control? I was assuming she just couldn't take it reliably but if she actually doesn't want to then that is a different question.
PigtailSam Her bf really brings out the worst in her. He doesn’t encourage her to study and work hard.
That is unfortunate.
@Jenna is someone who posted a fictional story here and tried to pass it off as a true account, using several fake accounts in the process. There are a few similarities between the way her story started and what you have written, so I can see why @Philip is reminded of her but I think his accusation is a little pre-mature.
As someone who dealt with some of the same issues (I am ADD), I might suggest that you involve her more in the process of deciding how to deal with this. There should be something in place to provide accountability but if she has a voice in what that looks like it is more likely she will respond well. You can suggest chastity as one of several options and ask her to come up with her own ideas.
This assumes that she actually wants to do well in college and is just having issues putting in the work. If she doesn't value her grades then leaving school and finding something else to do is probably for the best.