The document summarizes the results of a questionnaire about teenagers' worries. The top worry among students from all countries was about their future. Specifically, students worried about school failure and success, money problems, family issues, living conditions, friends, and not achieving their life goals. Additional major worries included health problems like eating disorders, depression, unemployment during economic crises, poverty, the end of the world, and terrorism. School success and failure, as well as health issues, were among the most commonly cited concerns.