Is this in okay way to get this girl's number?

I have one weekly college class with her (Biology Lab), and I really like her, but it hurts that I only get to see/ talk to her one day a week. I want to get her number, but the only comfortable way I think I can do it is by asking if she wants to study together sometime. She told me she has a lot of spare time on Tuesdays between her classes and so do I, so that seems like a good chance to study with her and talk to her more. This is just a hunch, but I have a feeling she likes me a little (or at least she doesn't mind talking with me). So do you think this is a good way to get her number if my intentions are to get to know her more? Or is there a better way? Thanks to anyone who helps.