Part I: Introduction Walker, Craven, Tokunaga, Introduction. Part II: Definitional Questions Bauman, Why it Matters. Smith, del Barrio, Tokunaga, Definitions of Bullying and Cyberbullying. Bauman, Underwood, Card, Definitions: Another Perspective and a Proposal for a Beginning with Cyberagression. Part III: Theoretical Framework Espelage, Rao, Craven, Theories of Cyberbullying. Craven, Marsh, Parada, Potent Ways Forward. Part IV: Methods Bauman, Methodology: Why it Matters. Bauman, Sampling. Espinoza, Juvonen, Methods Used in Cyberbullying Research. Underwoord, Card, Moving Beyond Tradition and Convenience. Bauman, Cross, Methods: Guiding Principles. Mishna, Underwood, Milne, Gibson, Ethical Issues. Spears, Zeedberg, Emerging Methodological Strategies to Address Cyberbullying. Part V: Measures Ybarra, Measurement: Why it Matters. Card, Psychometric Considerations for Cyberbully Research. Strohmeier, Ayoyama, Gradinger, Toda, Cyber-victimization and Cyberaggression in Eastern and Western Countries. Rivers, What to Measure? Mishna, Van Wert, Qualitative Studies. Part VI: Implications Campbell, How Research Findings Can Inform Legislation and School Policy on Cyberbullying. Cross. Walker, Using Research to Inform Cyberbullying Prevention and Intervention. Yoon, Future Research Questions in Cyberbullying. Cross, Bauman, Walker, Summary and Conclusions.