What is the school system like in the USA?

At my school we dont have the same lesson everyday but we learn more about one thing for awhile then move on! Like at the beginning of the yr you review the yr before stuff then you learn new things! You can't where shorts that show your butt and you can't wear shirts that show ur stomach! We have a first bell and it rings at 7:55 in the morning then the second one at 8:00am at the end of he day we get out at 3:22... Last yr we had too many snow days so the made the day longer and they liked that so they kept the time that way other wise we would get out at 3:15.... R u coming to America?? My bff is from Korea and she liked it here