Most of the items that can be added to a Lessons page can be made "required". That is, students must open (if the item is a resource) or complete (if the item is a forum posting, quiz, assignment, question, comment or student page). Further, the Lessons tool allows instructors to require students to complete one item in the list before allowing access to another item in the list.
Click on the Lessons tool in the Tool Menu to display the page.
Note: The default or blank Lessons page contains text and images that explain the basic functionality of the Lessons tool.
Notice that Required items are indicated with an asterisk to the left of the item.
Check Don't Release Item Until All Prerequisites are Completed option, then click Update Item.
Notice that items that are conditionally released display [Has prerequisites] in red text next to the item.
In the example shown above, the Weekly Materials: Week 1 cannot be opened until the required Syllabus Quiz has been submitted.