Youth in certain parts of the Middle East suffer from alarmingly high rates of mental illness combined with lack of availability of mental health services and a stigma for seeking help. Research has shown that teaching adolescents to adopt a growth mindset about their personality is associated with long term decrease in psychological distress symptoms such as depression, anxiety and self-hate and increase in psychological well-being symptoms such as hope and agency. These mental health benefits are true even when the growth mindset intervention is presented to the youth online in a single session. A team of faculty and students from Holy Cross College traveled from the United States to Lebanon to investigate the effect of an online personality growth mindset single session intervention (SSI) that is part of Project Yes (https://www.schleiderlab.org/yes.html) on mental health of Lebanese and Syrian refugee youth. In collaboration with Jessica Schleider, the founder of the Lab for Scalable Mental Health and Project Yes, and psychologists in Lebanon, the intervention was translated into Arabic and adapted to the Arabic culture. The intervention was associated with a decrease in hopelessness and self-hate and an increase in perceived control. Arab adolescents rated the intervention as feasible, enjoyable, and likely to help other youth. This study provides the first evidence in the Arab world of the mental health benefits of a culturally acceptable growth mindset intervention.  Recently, there is evidence of a global mental health crisis among adolescents. Evidence based online growth mindset SSIs have multiple benefits that make them appealing to teenagers. They are brief, accessible, self-guided, feasible, attractive, engaging, free of cost, non-pharmaceutical, anonymous and do not require parental involvement or administration by mental health professionals. Accordingly, Project Yes has been translated into six languages and is currently being tested in various cultures. Online growth mindset single session interventions are promising tools in improving mental health in teenagers around the world and bridging the gap between adolescents’ dire need for mental health treatment and barriers to accessing traditional therapeutic services.