text: First, using the "Facial Action Coding System" to read students emotions during class is good because it can let the teacher know how they feel. For an example, if a student was taking a test or a quiz online and was slacking off or getting tired, the computer would switch the questions up until they find the right questions to ask when the student face expression chamges. While doing that, it helps them stay on track and not get bored that easily. The system recognize emotion by the every muscles on your face. This new envention even figured out how Mona Liza was feeling by just technology.