Sheri L. Turrell, PhD, is a clinical psychologist living with her family in Toronto, ON, Canada. She is passionate about her clinical work with adolescents, helping them move toward a life that matters. Turrell is primary investigator, working in collaboration with Mary Bell, for studies of group-based acceptance and commitment therapy (ACT. She runs a full-time private practice, and enjoys being a consultant and trainer for graduate students and mental health professionals who are interested in learning ACT. Turrell teaches ACT at the university level, where she also facilitates therapy groups. Christopher McCurry, PhD, is a clinical child psychologist in private practice specializing in the treatment of childhood anxiety. He is clinical assistant professor in the departments of psychology and psychiatry at the University of Washington in Seattle, WA. Mary Bell, MSW, RSW, is a social worker in Toronto, ON, Canada. Currently affiliated with The Hospital for Sick Children in Toronto, Bell has had a private practice in Toronto and Singapore. Collaborating with Sheri Turrell, she continues to evolve an ACT approach to working with adolescents and their families. She loves to share ACT with clients and other practitioners.