text: On average, students miss at least a few days of school every year due to being ill or just away on a vacation. If you miss even just 1 or 2 days of school it can be very difficult for kids to make up all the work since they missed the lecture by the teacher in class. Certain classes don't post what you missed online making it even harder to learn the material when you weren't in class that day. Most of the time when people are sick they usually watch TV or look at their phone so teachers mine as well record a video of them teaching the class so that way students can learn the lesson while they are at home.