How do I require completion of a page in Lessons?
Instructors can require the completion of one page or subpage in Lessons before allowing students to move on to subsequent pages or subpages in the hierarchy of the Lessons tool. This means that instructors can require all of the required items on one page to be completed before students have access to subsequent pages or subpages.
See How do I require completion of an item on a page in Lessons? for directions on requiring an item on a page to be completed.