There are many efforts to prevent or reduce bullying that are being carried out in schools across America. I would say that most of them revolve around a couple of ideas.
First, there are efforts to teach kids to stand up for themselves instead of allowing themselves to be bullied. These efforts encourage kids to resist whenever they see bullying happening -- no matter who is being bullied.
Second, there are efforts to encourage all kids (including the bullies) to empathize with others. The most interesting one I've heard of is one that brings infants into classrooms and makes the kids help take care of them. This helps the kids be in tune with the feelings of others and makes them less likely to bully.