Check out http://www.uwex.edu/about/continuing-education.html to see all the on-line options available through the UW-System. UW-Extension also offers undergraduate distance education courses through their Independent Learning Program. (These are traditional independent learning courses, or online courses). Visit them at: https://il.wisconsin.edu/index.aspx.
If you plan to take a course through one of these sister institutions and transfer it back to UW-Eau Claire, check the Transfer Wizard to see how a specific course will transfer to Eau Claire.
Be sure that courses taken through another institution will transfer to your degree program at UWEC. If you have questions about transferability, your academic adviser can help you with this or you can contact the Registrar's Office at 836-4524.