This study aims to develop and verify a diagnostic scale of teachers’ competency to prevent
and cope with school violence. This study drew the definition and sub-factors of teachers’
competency they must have in order to prevent and cope with school violence through literature
review and developed questions. In addition, content validity was reviewed with a total of 11
experts over four times, and a scale was developed and validated by verifying the validity and
reliability through a survey two times. The survey was conducted with 758 in-service teachers in
the metropolitan areas of Seoul and Gyeonggi-do. In order to secure construct validity, factor
analysis was conducted, and the convergence and discriminant validity were verified. Also, in
order to secure concurrent validity, a correlation analysis between teacher efficacy score and
teacher leadership score was conducted, and the reliability of questions-internal consistency was
verified, the difference between the teacher groups was analyzed using t-test and ANOVA. The
results of the study, teachers’ competency in preventing and coping with school violence were five
sub-factors and 18 questions include “competency of aware of school violence,” “competency of
communication with parents,” “competency of counseling with related students of school violence,”
“competency of understanding peer-relationship” and “competency of administering non-violent
classroom climate.” Developed scale had reliability and feasibility secured. Lastly, in order to solve
school violence, implications for future research and education of teachers’ competency were
proposed.