text: The lastest software innovation from Prof. Huang can tell you if someone is mad, sad, or happy. All the computer need's is a 3-D computer model of that person face. Having this kind of technology to read expressions can be good in a classrooms. It'll tell teacher if that student is confused or bored. This type of technology will also tell if students are happy, mad, or sad. Teachers can confront students by asking if their okay, what part of the lesson in confusing to them.