Hi there!
Teaching teens can be a toughie because of the developmental stages they are going through. They are insecure and often seem blasé but there are ways to get through to them. Teens don't like to be treated like children, they don't like to feel silly around their peers and they love to have their say.
Why not try and involve them in the decision process? Give them a choice in what is being planned for their lessons. Here is a link to an article I wrote on
Teaching Teens
I used to quiver in my shoes when I had a teen class until I did a lot of research and applied what I learnt to their classes. It's all in the article. But, if you don't have the time to read it then try and apply the following: use music, group work, role-playing, tap into what they are interested in (ask them!), use games adapted to their age and keep the pace quick and varied.
Hope this helps!
Louanne