Users are regularly confused about where they will go when they use the "Next" and "Back" buttons in Lessons, and have described the paths those buttons take them through as seeming random to them. While some of this could be attributed to not being aware of the default behavior, this is further complicated by having two navigation button behavior options for people building the subpages. Changing the default functionality of those buttons doesn't give any indication to user of that new behavior. Since people are already confused about how they are moved through sets of subpages, having mixed results when they click on different sites just makes it worse.
It would be great if those Next and Back buttons showed the title of the page that the user will be taken to when clicking them, e.g., "Back: Week 1 Overivew" and "Next: Discussion 1: Introductions."