text: One facial expression can give it all away of how you are feeling. Facial Action Coding System can identify mixed emotions, each expression that is being made is compared to a neutal face that is not showing any emotional. If a student is having a bad day or something is wrong with them the software will instantly let them know how they are feeling. As in the painting "Mona Lisa" they were not sure what her emotions "she's 83 percent happy, 9 percent disguested, 6 percent fearful and 2 percent angry."