High school, students will find people who are way more mature than the kids in middle school. Middle school, kids are changing and starting to grow out of that “immature” age. These are the many differences between high school and middle school.
In particular, high school students have more choices with choosing their classes. There are many choices in the classes. What's different than the middle school is that there could be different people in different grades within the class. Teachers also assign way more homework than the middle school. Even though school assigns homework, there’s days teachers don't.
Additionally, high school, seems to be a bit more drama filled.