Lessons and topics
Lessons
Lessons are like the chapters of a book. They divide the learning material into meaningful related groups.
Topics
Topics are the individual sections in a lesson. They structure the different aspects of a lesson into blocks that are easy to master.
Your profile remembers the topic or lesson you were last working on. After logging in, you can quickly find your way back to that point. It’s this feature that makes it easy to work through the material in stages.
Where to go next
This lesson includes a quiz at this point.
Please click “Back to Lesson” below and then click “Quiz to Test.”