To be a polite middle-school-student,we'll have to do a lot of things. First,we can't throw rubbish everywhere. We must throw them in the rubbish bins. Littering is not a good habit. Second, we shall speak politely. We shall respect the others. Third, behave well. We should be kind to others, warm-hearted to everyone, and generous to our friends.That's some tips for you to be a polite middle-school-student.