A pool of 141 juvenile justice intervention studies conducted in the United States, utilizing a control group, reporting quantitative outcomes and spanning the years 1996 to 2009 were identified via electronic searches. Study inclusion into the summary of best practices was based on the demonstrated equivalence of study groups (treatment and control) at the start of the study, the equivalence of the study groups at posttest, and the degree to which fidelity to treatment procedures was demonstrated. Of the 141 studies, 120 failed quality review, mostly due to fidelity issues. Of the 21 articles that passed, 76% used a therapeutic approach (vs. behavioral control) to behavioral change, with the treatment group outperforming the control group in 88% of the therapeutic intervention studies.