In many places, I found there is no visual divider between the page's main context and the course navigation widgets Previous activity / Jump to activity / Next activity. I already saw people to get lost because clicking on the wrong link and I often find myself clicking the wrong one, too.

I believe we should split and move those prev / next / jump to into their own visual region.

This is particularly apparent on pages that have their own navigation elements such as Lessons or Books.

The course navigation seems to overweight those and catch user's attention first. Going to the next activity implies loosing the current context. It should not be the first thing you think to do. The UI should help learners to focus on what's essential in where they currently are.