First day teaching

I did my self-introduction to two sets of "first grade" junior high students (the equivalent of 6th grade) and it was so much fun!
I taught them how to shake hands and give a high five. When I asked them to exchange greetings with one another, many of them froze when the next person in line was a member of the opposite sex. I almost forgot the awkwardness of adolescence.
It's true. Boys still have cooties through their teens.

There was this one student in the 1st class that surprised me a bit. Before class officially started, she came up to me and introduced herself in English and told me she really liked English. She was really friendly and talkative and seem to be the one who would always participate. When class started, she put her head down signifying that she wasn't going to participate when it was time to do an activity! I can't quite figure all this out.