A Course Tour
Click on any of the module titles in your 'My Courses' listing to bring you to the module homepage.
You should see the following default sections:

The Control Panel provides access to instructor tools. This section is not visible to students.
From here, you can access course tools such as blogs, wikis, video tools, etc.
You can manage users, create assignments, access students' work and grade and provide feedback.

When the Edit mode is switched ON, you can add and modify content.
Clicking on the EYE symbol to the left allows you to enter a Student view of the course under a dummy student user, which replicates the exact experience of a student on the course.
This is a great way of testing your content from the student perspective, you can even submit a sample assignment, grade as instructor and view feedback as the student by switching between student and instructor views.

The Announcements page is set as the course entry page.
All announcements you send to students on the course will appear here.