Internet as well as electronic devices has given adolescents novel means of socializing and positive
effects in academic achievement, beside situations that cause various negative consequences as an effect of
the massive usage of such technologies. Cyber-bullying-behavior comes to the forefront among these
problems. The adolescents' self-perception is damagingly affected either by being cyber-bullies or cyber-
victims, consequently, psychological risks are exhibited range from frustration, sadness, fear, and even
suicide. Aim: The study intended to evaluate the effect of a cyber-bullying prevention program "Media
Heroes" on knowledge and self-perception among the studied adolescents in Port Said Governorate. Method:
One- group quasi-experimental design with pre-post evaluation, which was conducted in six preparatory
schools randomly chosen representing the three educational zones of Port Said Governorate. The studied
subjects compromised 265 adolescents recruited randomly from every educational grade. Tools: 1) a
Structured Interview Questionnaire for the adolescents, 2) European Cyber-bulling Intervention Project
Questionnaire, and 3) Self-Perception Profile for Adolescents Scale were used to collect data. Results: a
highly statistically significant difference between the studied adolescents' total knowledge scores regarding
cyber-bullying pre and post program was detected at P < 0.001. Also, highly statistically significant
differences between the studied adolescents' total mean scores of all domains of self-perception except close
friendship pre and post program were remarked at P < 0.001. Conclusion: A highly statistically significant
improvement in adolescents' knowledge and self-perception after the application of a cyber-bullying
prevention program was remarkable. Recommendations: Designing and applying more continuous
educational programs for adolescents to increase their awareness level regarding cyber-bullying to prevent
its
negative
psychological,
behavioral,
academic,
and
even
physical