text: Lastly, sitting at home for online classes could be very harmful to the students health. With the amount of obesity in the world, the last thing we want is for more kids to be sitting at home taking online courses instead of being at a conventional school. Many online programs have no sports teams, giving kids almost no way to get exercise throughout the day, which is needed in order to live a healthy life. Obesity isn't the only way that online school can harm students' health. It is incredibly bad for your eyes to be looking at a screen for seven hours. Students need a break from screens when at school.