A. Navigation bar: Open frequently used tools in one step. Select the Content, Calendar, Discussions, Gradebook, and Messages tabs to easily access those tools.
B. Details & Actions: View course information and tools with these options:
C. Course content: All of your course content appears in the main part of the page. When you open a piece of content, it slides out in a layer on top of the Course Content page. Close layers to navigate back to a previous spot in your course. Progress tracking allows you to keep track of what content you've completed and which one you still need to go through. More on content in your courses
D. New activity: An activity icon appears when new activity occurs in a course conversation for assignments, tests, and documents. The activity icon also appears to indicate new discussions.
Additional Resources:
Video Demonstration: