Think you have no time to learn a new dance? Do you have the time but just are too afraid to teach your students for fear of doing it wrong? Well fear no more. JUST MAKE IT UP!
Of course there are many traditional dances out there that require many ornate and exact steps but you do not have to teach a traditional dance to your students. Pick a song according to the culture you are teaching and create the movements yourself. I love to just make up movements myself because I can cater the difficulty of the dance to each class! I do stay within the style of dance though, Celtic jigs and step are very hard and fast movements, African dance varies from song to song with either slow and connected movement or faster and very grounded. Latin dance is very simple and grounded as well, or you could go as far as Asian with very connected and meaningful story-like motions. What ever you chose, feel free to just experiment and have fun with it. No one is going to correct you in a classroom (unless you of course have an expert there).
Dance gets students up and moving, which many of them do need during the school day! The more they move around, the more into the lesson they are!