Netscape has a news option which you can use both at home and in the lab. This is the Department's Undergraduate page. Select the course you are looking for. At all times within the program, you will notice on the bottom of the screen all the available options to you.
More detailed help is available within the program itself.
Type the command courseInfo followed by the course number and the section. If it isn't a course this term, follow it with year and the session. Otherwise, please inquire with the instructor about the way to retrieve your marks.