Good job, Rachel! As a junior high school teacher, I fought the battle for many years. Courtesy was not a hidden curriculum. It was required. I was able to get away with it because I won the respect of my students. It can be done, but it takes work. It also takes visits to the homes of students. I have told parents to teach their sons/daughters courtesy. I won't bore you with some of my experiences, but...........what adventures! What beautiful memories. They outweigh the other ones.