How can I ask this girl out? Please Respond?

Okay so there's this girl in a few of my cles (I'm a high school senior) and we've been talking a lot in school throughout the year, especially recently. I recently lost my Psychology binder with all my notes in it and the midterm is next week, and she enthusiastically offered to make me a copy of all her notes. I took her up on the offer and I feel like now is a good to time to ask her out (I was going to do it after she gives me the notes in a couple days). I'm just a little nervous and not sure about how exactly I should do it. I'm trying not to overthink it but I don't wanna mess this up because I really like her.