This is perhaps the most important step of all! Students can't see your course until you've set it to Active status. To do this:
In your course, click on Course Admin in the Navbar
Select Course Offering Information
Scroll down and check "Course is active"
Click the blue Save button at bottom of the screen
Don't wait until the last minute to do this. Students will be looking for your course before the semester starts and they will get anxious if they don't see your course. We recommend making courses active two-weeks prior to the start of the course. You can hide all the individual parts you don't want them to see until you are ready, but please make sure to have your Gradebook and Assignments in place before making the course active.