The questions following each lesson are designed to help you better recall the lesson content rather than to prove your mastery of the content. The “Short Answer” questions type are not graded, but the “Multiple/Single Choice” and “Fill In the Blank” type do show whether your answers were correct or incorrect. You cannot “fail” the quiz, but if you would like to retake it, please see our other FAQ about where your answers from each quiz attempt are saved so you can reuse them for a later attempt.