text: For example, if you smile when a Web ad appears on your screen, a similar add might follow. Dr. Huang predict that " A classroom computer could recognize when a student is becoming confused or bored." Another prediction that Dr. Huang did was that "Then it could modify the lesson, like an effective human instructor." Every human or most human communication is nonverbal, including emotional communication.I disagree that all students must participate in extracurricular activities because those activities require you to stay after school, and some students might have more important tasks to do at their homes. For example, those students might have to baby sit their little siblings while their mom is still at work. I will be going into a few more examples in the following paragraphs.