text: If teachers are not able to tell what is going on with a studant it make a teacher just get mad but the proplem with that is that thaey dont't know what that kid is going thought. In many different ways people are not all the same and some times school empolyees don't understand that. This technology works in many=y diffrent ways but it starts off when the computer constructs a 3-D computer modle of the face. The movement in one or more muscle is called an "action unit"