As can be seen below, cognitive behavioral therapy (CBT) currently has the most research evidence for the treatment of general symptoms of anxiety in young people. This treatment can be administered in a variety of different formats, each of which has varying levels of research support.
Anxiety - General symptoms
Source: Silverman, W. K., Pina, A. A., & Viswesvaran, Chockalingam (2008). Evidence-based psychosocial treatments for phobic and anxiety disorders in children and adolescents: A review and meta-analyses. Journal of Clinical Child & Adolescent Psychology, 37, 105-130.