Some courses will place required readings on the Libraries' e-reserves system. Here you will find electronic copies of your course readings, or links to electronic copies, which you can access at any time. To access reserves, go to the Libraries' homepage (http://www.uvic.ca/library) and then click on the "Course Reserves" option, as shown in the screenshot below.
Some courses will not use the Libraries' e-reserves system, and may simply provide links to various resources from within your course (usually within individual course units, within your course syllabus, or as a separate readings page within your course).
If you're not sure where your course readings are, check with your instructor for clarification.