The use of techonology to read the expressios of students in classroom is valuable because it is very helpful for all students when they need to look up something. They can find everything very quickly, and more easy with using the techonoly.

As the article said "Imagine being able to detact exactly how other people are felling, even when they are trying to hide their emitions." We can look up at the techlongy to tell how many percent happy, disgusted, fearful, and angry on the imagine. From the text state, "She's 83 percent happy, 9 percent disgusted, 6 percent fearfulnpm and 2 percent angry."

Techonoly today becomes very important, and useful for all of the peoples in the world. They have everything, they have all information for us to look up if we need which very helpfuf our works, and it makes our work become easier. From he text states, "'A classroom computer could recognize when a student is becoming confused or bored,' Dr. Huang predicts."

It can also help people relax after a long working, and stressful, or school. We can use it to play a game, watch a movie, or listen to music to help us relax. From the text states, "the same technology cab make computer-animated faces more expressive-for video games or video surgery."