5.4. Do I have to do the course all in one sitting?

No, the course is hosted on a server that remembers your progress. You can leave, and come back. You can work on one device at the office, then continue on a different device at home.

You may see a dialog asking if you want to resume where you left off, and you may have to repeat one or two pages.

If you complete a Lesson, and later the course tries to make you repeat it, make sure your browser has “cookies” and javascript enabled.