Khan Academy
A learning tool that can be used as a supplement to in class lectures. (Or used when you are working at two in the morning when the instructor and tutors are unavailable :D )
Take caution, some methods for solving problems may be different than in class.
Accessing the Electronic Textbook
To register for the course follow the instructions found in this PDF
If you bought the book through the bookstore here is the other course website instructions as explained in the email PDF