A user may be asked to watch a video, to answer a multiple-choice or fill-in-the-blanks question, or to enter a
command in the R console precisely as if he or she were using R in practice. Emphasis is on the last aspect, interacting with the R console.
User responses are tested for correctness and hints are given if appropriate.
Progress is automatically saved so that a user may quit at any time and later resume without losing work.
Once a lesson is completed, the Coursera Web site is notified so that the student can receive credit for completing the lesson.