(statistics are for USA only, but I believe that they repeat themselves in every single country on this planet)
1] Over 3.2 million students are victims of bullying each year.
2] 1 in 4 teachers see nothing wrong with bullying and will only intervene 4 percent of the time.
3] Approximately 160,000 teens skip school every day because of bullying.
4] 1 in 7 students in grades K-12 is either a bully or a victim of bullying.
5] 56 percent of students have personally witnessed some type of bullying at school and did nothing.
6] Over two-thirds of students believe that schools respond poorly to bullying, with a high percentage of students believing that adult help is infrequent and ineffective.
7] 71 percent of students report incidents of bullying as a problem at their school.
8] 90 percent of 4th through 8th graders report being victims of bullying.
9] 1 out 10 students drop out of school because of repeated bullying.
10] Harassment and bullying have been linked to 75 percent of school-shooting incidents.
11] Physical bullying increases in elementary school, peaks in middle school and declines in high school. Verbal abuse, on the other hand, remains constant.
(source: DoSomething.org )