Once you are signed in to your CN account, you can easily join courses.
To join a course, first click the "Join a Course" button at the bottom of your homepage.
Next, enter the 7 digit course ID that your institution or instructor has given you. If you don't have one, you will need to contact them. The CN Course ID is the 7-digit number in the course URL.
If the instructor has set up a PIN code for the course, enter it here and the click Join Course
After you submit, you will be taken to the course to begin learning.
If you need assistance joining a CN course, feel free to contact CN support email@example.com.