1. Introduction: The Example of RACHEL; 2. Adolescence; 3. What are Technology and Media?; 4. Technology and Social Change; 5. How Do Adolescents Use Media and Technology?; 6. Adolescent Identity and Globalization; 7. Benefits of Adolescent Technology and Media Use; 8. Hazards of Adolescent Technology and Media Use; 9. Complex Effects of Media and Technology on Adolescents; 10. Conclusion.