About PPN Programs
Proven and Promising Programs
Programs are generally assigned either a Proven or a Promising rating, depending on whether they have met certain evidence criteria.
Other Reviewed Programs
Some programs are identified as Other Reviewed Programs. These programs have not undergone a full review by PPN, but evidence of their effectiveness has been reviewed by one or more credible organizations that apply similar evidence criteria.
Read more about the criteria used to evaluate programs.
More to Come
The PPN site is always a work in progress. We are currently evaluating many programs that do not yet appear on the site. Those which meet our criteria will be posted as soon as possible.
To recommend a program for consideration, write to