Modules are used to organize course content by weeks, units, or whatever organizational structure works for your course. With modules, you are essentially creating a one-directional linear flow of what you would like your students to do.
Once you create modules, you can add content items, set prerequisites, and add requirements.
The Modules Index Page is designed with global settings at the top of the page  followed by individual modules . Course content items are nested within each module .
Global settings include collapsing or expanding all modules, viewing a student’s progress in a module and adding new modules.
In Modules, you can view all the modules in your course. Modules are organized by order of progression.
Modules house the content items within each module. By default, modules are expanded and show all items in the module. To collapse the module, click the collapse arrow .
You can use the drag and drop option to reorder modules . Click the drag handle next to the module name. Drop the module in the desired location by releasing the mouse.
Each module header contains the name of the module .
The header may also contain module prerequisites and module requirements .
Use Modules to:
Create prerequisite activities that students must complete before moving on in the course
Track student progress through a sequence of learning activities
Organize course content by unit, day, week, topic or Outcome