I do not have any experience using skype in a P.E. setting but I do like the idea of it. If I were to use it I would try a competition between different schools in the district. For example, during a soccer unit we could compare skills between schools and challenge each other to different tricks, etc. Also, we have a dance unit known as ACES (All Children Exercise Simultaneously) in which all the schools in the district practice different dances and perform them on a particular day. Using Skype would be very beneficial in this unit because we could collaborate with another school to practice these dances.