How do i find this girl?

[El nica]

I really like this girl in college but i cant't find her at all. I had one 12 week course with her and now it's over. I wanted to talk to her during the 12 week course but i kept being shy and never did. I know she still goes her and i want to just run into her one day and ask her for her number. The problem is there are a many students here and it would take forever to find her among so many people. I truly want to talk to her face to face ASAP and not through any social media. I'm really mad at myself for not talking to her whenever i had the chance to. Since i'm desperate to talk to her now, and i don't know anyone that knows her, and she doesn't really know me, what should i do?

[Wascally Wabbit]

There is nothing you can do with so little information.