How do I add prerequisites to a module?
When you set a module prerequisite, the module is locked until a student completes the required items. However, unless completion requirements are set for prior modules, students will still be able to access upcoming modules.
When selecting a prerequisite module, you can only choose from previous modules. You may need to reorder modules to correct prerequisite availability.
Note: You can only add prerequisites if you have added at least one module.
Set Prerequisite

In the module drop-down menu, select the module students must complete before moving on.
Manage Prerequisites

To add additional prerequisites, click the Add Prerequisite link [1]. If you want to ensure students complete modules in order, you should add prerequisites for all modules that come before this module.
To remove a prerequisite, click the Remove icon [2].
Update Module

Click the Update Module button.
Re-Lock Module

If you change prerequisites that students have already fulfilled, Canvas will ask if you want to let students progress through the course or re-lock the modules and require students to complete the prerequisites again.
To re-lock the modules, click the Re-Lock Modules button [1]. To allow students to continue without any changes, click the Continue button [2].