We have large classes with a lot of content and are running into an issue where students don't know to scroll to complete multiple areas of content prior to going to the next lesson. They just hit 'next lesson' and get confused why they get a message, or that they missed something in the course. If we put one activity in each lesson it creates a new problem with the left menu getting too long (would need a third level of content categorization). If the 'next lesson' button is at the bottom of the content the user will more naturally scroll to get to the end.