This is a great review game to play with your orchestra class (or any other class - you would just have to think of new 'dares' appropriate to your class setting). Once students have learned their concert pieces, you can have some fun and play this game to get students to focus even better on their playing and work as a team.
The game is simple. Divide students into teams. I divide my orchestra class by section. (1 violin, 2 violin, viola, cello/bass) Each teams picks a captain who is the spokesperson. Right from the beginning, I tell students that it is possible to end up with negative points. Any team that is loud and distracting while another team is performing willl lose a point. Each team captian decides whether the team will 'Play' or 'Dare'. If the student chooses 'Play', have the group perform a small section from your concert music. I always choose a section that I know needs extra care with intonation, rhythm, or listening. If the group plays the sections perfectly and the intonation and rhythm matches, they get one point. If the group choose dare, you click on the screen to open the challenge. The 'Dares' can be a little whacky, but musicianship is still required in order to earn the point. Students are learning about teamwork, proper position, etc. You can always customize the 'Dares' to fit your own ideas.