High school students are an altogether different lot, they have a bit 'been there, done that' kinda attitude. It is imperative that you teach them how to work together, as a team. For this, some funny yet useful team-building exercises and games can come to your rescue.
My Favorite Team Builder - Perfect for Team Cohesion Here is one of my favorite all time team builders. Do you want greater team cohesion at the end of a training event or meeting? Do you want people leaving your training event or meeting feeling really good? Try this team builder activity. I have personally facilitated this activity many times and it has never failed. See activity here http://www.teamworkandleadership.com/2012/02/my-favorite-team-builder-perfect-for-team-cohesion.html