Formatting entries for online course pages and discussion posts should follow similar formatting you will find for other online sources in the 8th edition of MLA. Provide as much information as you can based on an online resource example. Since the information is accessed directly online, you will likely need just one container system.
Online Course & Discussion Boards | 8th Edition
Sands, Crystal. "English 101: English Composition." Excelsior College, 2016, mycourses.excelsior.edu.
Brunell, David. "Re: Armstrong Article." Reflections on Assignment 1, Excelsior College, 2013, mycourses.excelsior.edu.