Rate the following essay on its writing, argument, and language skills:
The Facial Action Coding System (FACS) is a new technology that enables computers to identify human emotions. I think that the use of this technology to read the emotional expressions of students in a classroom is valuable because it can modify itself to help the student change their emotions and make the classroom better for the students by changing the computer to satisfy the student.

One way that this technology can be valuable is with ad-modifying. The article gives a great example of this. "For example if you smile when a web-ad appears on the screen, a similar ad may follow. But if you frown the next ad will be different." This evidence supports the claim that the technology is valuable because it could keep students interested with ads. And they won't be annoyed with seeing the same ads they don't like, again and again.

Another way that this technology can be valuable is with lesson modifying. Dr. Huang predicts that "when a student is becoming confused or bored, the computer could then modify the lesson." This evidence also supports the claim that the technology is valuable because it can help the students.

If a student is confused on a lesson, the computer may change the way that it's being taught so that the student can understand.

The technology could also not be valuable to students in a classroom. It can misinterpret the emotions of a student and modify the wrong things. For example, if a student looks confused, but is really not, the computer will pick up on that facial expression and modify the lesson, which may actually make the student confused.

In conclusion, the FACS technology can be very valuable to read the emotional expressions of students in a classroom because a student can personally modify their computer without even knowing it. It will keep the students interested, and that can really help the students learn.

Score: 4