National Registry of Evidence-Based Programs (NREPP)

In 2010, the STEP program was added to SAMHSA's (Substance Abuse and Mental Health Services Administration) National Registry of Evidence-based Programs and Practices (NREPP).  Though they do not "approve" programs, they do rate the quality of research, and STEP received a favorable review in all areas.

The review can be viewed here:

http://legacy.nreppadmin.net/ViewIntervention.aspx?id=132