Short Answer:
You can add or edit Course Modules by clicking Curriculum under the Content category within your course and clicking the ellipsis next to the Module or clicking + Lesson, + Quiz, or + Assignment to add a module.
Short Answer:
You can add or edit Course Modules by clicking Curriculum under the Content category within your course and clicking the ellipsis next to the Module or clicking + Lesson, + Quiz, or + Assignment to add a module.