I work in Voionmaa high school (Finland, Jyväskylä), which has special task for help athletes to do both practice and study well. We use iPad in sports, shoot videos from training from hockey to track and field. Students and teachers take videos, edit with iMovie. It also a good material to promote your school
One favorite app is Coachmyvideo. Our hockey coach Mika Lievonen uses app in his training . You can make slow motions, frame by frame, forward and reverse, compare to videos or photos each other. One good feature is drawing tool, it also calculates angles.
Photo from two videos feature