Why do I feel more mature then my classmates?

I'm in the tenth grade and sometimes I feel so much more mature then my classmates! They are horrible to the teachers being pests by yelling out and talking constantly. They are also rude to the other people in the class. Its silly its like your shunned if you don't do drugs, aren't popular, don't dress a certain way, or are curtious to the teachers. I mean I goof off sometimes too but I do it after school or during lunch. I don't do drugs, smoke or drink. I don't need them to have fun. My friends and I are considered weird because we joke around alot, are good kids and respectful. Why do I feel light years more mature then my classmates sometimes?