Mandatory lessons are lessons that contain questions, and will thus help you earn course points. We highly recommend answering all questions since that will reinforce your learning as well as count towards getting your Course Certificate. This very lesson item, for instance, is a mandatory lesson since it contains a question.
Mandatory lessons are indicated on the course navigator on your left by a light gray circle.
Once you’ve completed all questions in a mandatory lesson, the circle will turn into a circular tick.
Optional lessons are lessons without questions. These include discussion lessons and lessons that contain additional information that you might be interested in. Optional lessons won’t score you course points, but they still provide excellent educational value and we encourage you to read them in full.
Optional lessons are indicated on your course navigator by a dotted circle.