aronnax
Let your spirit be free
What measures?
Perhaps teachers could be more involved in the dealings with bullying. Have the teachers actively engage in Student social life to see if there are any students being bullied and then addressing it.
Another is to make the students feel that they can be open to teachers. Many times, abuses such as these goes unnoticed because the victims never go up to the teachers and inform them. Make the system so that, it doesn't seem like there are such repercussions for "squealing to the teachers".
Encourage students to not just conform with the norm, make it that differences are encouraged and not punished by peers. I was bullied terribly as a kid. But it took me asserting myself confidently for all the bullying to stop. Sometimes, people need a push in that direction in asserting themselves and schools should serve as that push. Students and teachers need to be able to communicate together for the teachers to be able to do something about it.