Many professors use TWEN for their courses. To use it, you'll need to activate the WestlawNext password that you received at orientation. This student guide to TWEN has detailed instructions for setting up and using TWEN.
If you have any trouble, you have access to 24/7 support from Westlaw. For in-person help, stop by the reference desk from 10-5 Monday - Friday or 1-5 Sunday here in the law library.
Good luck with your classes!