Having police officers in schools is stressful for children. Instead of police officers, it would be more productive to have that money spent on mental health services and returning full-time counselors to schools. Counselors could then address potential problems before they become major incidents. A police officer cannot be in all places at once, so may not prevent a school shooting at all.
Overall, I do not believe school violence has increased to the point that superpowers should require their schools to be fully staffed with police officers, at least I feel this way about my own country, the United States. In our country we are looking at adding police officers to our schools due to the fact that we continue to have random school shootings and these aren't always carried out by a student.
No, school violence has not increased to the point that superpowers should require their schools to be fully staffed with police officers, because parents and students do not want going to school to feel like going to prison. Some police presence would be helpful, but there is a point where it is too far and creates a bad environment.
No, supper powers should to have there schools staff police officers to counter rising school violence. This would only put a cover over the issue and solve nothing. The people who are at the source of the rising violence need to be targeted directly and better understood about why they did what they did. Knowledge is power and this knowledge would help prevent violence before it escalated to where police need to intervene.
It's curious to think of a number when schools would need a full staff of police on task. But it's clear that that number is not here today. Instead, it's important for teachers and PTA board to look at the cause, which in most cases is alienation. Violent video games and the like.