text: When you are happy and smile looking on the computer it going to detect, so how has you been. In school, is better and helping in students doing better on their grades so, facing to the screen of your classroom that students if they are boring or just confused on their class. Showing student they don'tlike the class by their teaching. Also students it just wanted it to be an interesant topic on each of their class. It also developing wat to communicate with humans and computers.