The site administrator can enable course requests. When this is enabled, any logged-in user can request a course. The site administrator, manager, and course creator can then create the requested course.
While logged in as the administrator, select Administration | Site administration | Courses | Course request.
Click to place a check mark in the field labeled Enable course requests.
Other settings on this page will enable the users to select a category for the course that they select.
For the field Course request notification, select everyone who you want to be notified when someone requests a course. If you want to select several users, use control-click to select them all.
Save your changes.