First teaching in senior high school

I feel nervous when I'm arrived at school, but I don't know why I feel happy for teaching. I teach second grade social science school in Jakarta. Why I nervous? Because I never teach senior high school before. When I'm in the class "blank" I don't know what I do first, and almost forget to introduce my self. The situation in the class so noisy, I'm a little confused for silent them and listen to my material. Yeah one hour lesson has been passed, and I will continue this lesson after recess. When the recess is over, I go back to the class. At the time, the situation in class so silent because one of the students get a scolding from their teacher. When I explain my lesson, I think they understand. But after  I go to their table, they don't understand. Hmm as a teacher must be careful, patient, attention to all students. I'm happy I can teach them because actually they want to learn, but sometimes they are lazy to learn something. When I give the exercise one and I say "Who wants to answer?" They keep silent. Next exercise two and I say the same, instead they want to answer with high spirits.Waw, as a teacher I'm happy for make them spirits in my lesson.  Nice introduction on the first day teaching with my new students. :)   ~ Thursday, August 30 2012 ~