text: Phone's have been useful since the time of their invention. From the ability to be able to talk to people from a long distance away to making sure that people can keep in touch with their work life. Next, being able to keep in touch with the family making sure to be kept in the loop if something bad does happen. Lastly, being able to call the police and other emergency services to save lives. Phones are a necessity in day to day life which includes on the road.   In this article it talked a lot about how maybe schools could use computers to sensor a student's emotion of either getting bored or losing interest and to be able for the computer to change the lesson slightly to get the students attention, But do you think this would really work? In some cases yes it might work for some people, but definetly not everyone. Why? Because some students may have diformaties in their muscles in their face, facial piercings that could afftect they way the computer reads your emotion, or even just simply you face might be showing one expression but you may feel another way.