text: They use video imagery the software tracks the facial movements. The painted face of mona lisa by tweaking diffrent units the computer can identify mixed emotions. every expression is compared against a face, The demonstration could bring a smile to your face, for example. If you smile when a AD appears on your screen the computer will bring up another AD that is similar to the AD your looking at right now. But if you frown the next AD won't be the same. According to the facial feedback using your facial mucsles doesn't only express human emotion they also help produce them.Some school offer distance learning as an opinion for students to attend classes from home by way of online or video conferencing. the students not focus in home sometime, for the TV, video games, and cell phones. The 20% the students, not go to school because is more difficult, but 80% the students go to school students don't benefit because have a distraction in home the TVs, are distraction or watching movies the students not focus in work in study some not doing a work or copies in internet .