text: The Facial Action Coding System uses video imagery to track facial movements with the new emotion-recognition software created in the system. It weighs every unit and can identify mixed emotions. Each expression is compared to a face that show no emotion also clled a neutral face. Dr Huang commented in the artile "Making Mona Lisa Smile" that he believes " A classroom computer could recognize when a student is becoming confused or bored,". This could be a great use to teachers in their classrooms so they know what to explain more on and for which student. As a student, I can assure anyone that the worst thing at school in a class is when you can't understand something. When a student is completely confused, they can loose intrest and also motivation to comprhend what's going in in class. Dr Huang also added that "it could modify the lesson, like an effective human instructor,".