Course Explorer has a FREE option for students to receive emails about section availability.
When logged into Course Explorer, you can create "Favorites" and opt to receive notifications when the status changes to have an opening. Section availability is checked every 10 minutes.
The Course Explorer provides the schedule of classes by term and a browsable database of general education requirements in addition to other resources.
For Course Catalog and Programs of Study, please visit the University of Illinois at Urbana-Champaign Academic Catalog, which maintains the official listing of courses, program, and degree requirements for undergraduate and graduate students.