School days should be shortened by two hours, because students should have more time to complete homework and study. One reason to shorten the school days is that if you want to get into a good high school or college, students will need lots of time for homework. The students will also need time to study for quizzes and tests. Another reason to cut the school days by two hours is because of how many children finish their homework at late hours, but with these shorter days, students would be able to finish homework earlier.
The last reason, is so that many children do not rush while doing their work, and so that they can take their time and pass in a neat assignment.
School days should also be shortened because more time for extra-curricular activities would be allowed. Many children take part in sports that they enjoy, and the children need time for that. The students also need time for other hobbies such as playing an instrument, and some are very talented, and to get better, they need to practice.
With all of the activities that the students are participating in, they also need time to sleep for a decent amount of time. They do not want to be tired for school the next day.
The final reason school days should be shortened is to have time for spending time with family and friends. The ones you love will not be on Earth forever, so you need to treasure the time that you have left with them. Many parents work long hours during the week, and with the shorter school days, the students can finish their studies and spend time with their parents when they come home from work. Also some students need to become more social so that they can be ready for interviews in college. The students can become more social by making more friends, and they will have time for this because of the shortened school days.