Draw a line on the surface and explain that it is the end of a cliff. If they stop before the line, they are the Road Runner. However, they were prepared for such a situation and therefore much smarter then the real Wile E. Coyote. This game is usually a hit. No one really loses and the skaters really get into it.
Relay races are a great way to end a group lessons and they help develop strong skating skills.
This gives you the chance to see the progress of each skater while keeping the group moving.