Seeing a peer bullied on the bus in Valhalla, N.Y., a set of teen triplets decided to do something. As high school seniors, they began teaching younger students about bullying and how bystanders can help. There was some concern the program would end when the Williams triplets graduated, but instead they passed the baton to a new crop of seniors. "How it happened, how quickly it grew, and the detail at which it was already formulated when it came forward was certainly a surprise," said Jonathon Thomas, Valhalla High School principal. Less surprising? Other schools have called Valhalla about replicating the kids-help-kids approach.