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About the  Programs that Work  Program Summaries

PPN program summaries provide key information about effective interventions. For information on how programs are reviewed for the site see How Programs are Considered.

Each program summary includes the following components:

Outcome Area and Indicator

The program may fall under one or more of the four outcome areas and associated indicators listed on the site. Programs are placed under an indicator for which there is demonstrated evidence of a positive impact. Topic areas that the program is related to are also listed.

Evidence Level

We've included programs that meet a minimum level of evidence and are labeled as follows:


    At least one credible, scientifically rigorous study that shows the program improves at least one indicator. Credibility and rigor are determined by issues such as study design, sample size, use of a reasonable comparison group, achieving a sizeable effect, low attrition, and the program's direct effect on the given indicator.


    At least some direct evidence that the program improves outcomes for children and families. This includes programs that affect intermediary variables rather than direct outcomes, have a formal evaluation with less-rigorous methodology, or contain many caveats about the findings.


    Program affects more than one indicator, and the level of evidence differs across indicators.

    Other Reviewed Programs

    Program has not been fully reviewed by PPN, but the evidence of its effectiveness has been reviewed by one or more credible organizations. There is at least some direct evidence that the program improves outcomes for children and families and affects one or more PPN indicators.

Program Overview

We provide a short overview of the program's design and intent, including age groups targeted.

Evaluation Methods

We summarize the methods used in the evaluations we included in our program review. We describe aspects of the evaluations such as the sample size, time frame, comparison group used, and statistical approach.

Key Evaluation Findings

We summarize the key findings drawn from the research literature. However, because we only provide summary information of each proven or promising program, we strongly recommend that users of this site refer to the full evaluation findings for a complete understanding of the program's strengths and weaknesses. Each program bibliography lists the materials we referenced to make our judgments.

Implementation Detail

We highlight program implementation (as it was evaluated) with respect to key aspects of program design such as curriculum used and staffing issues.


We identify the funding sources for the program as evaluated and/or the currently implemented program.

Probable Implementers

We list likely organizations or groups that would be interested in implementing this program.

Issues to Consider

We clarify why a program was assigned its specific evidence level and any limitations of the evaluation that should be considered by those interested in replicating it. Where applicable, we also note other indicators not included yet on the PPN site that the program may positively impact and any other noteworthy implications from the research literature. This section is intended to provide a useful interpretation of the preceding summary information.

Example Sites

We list several sites where the program has been implemented to date.

Contact Information and Available Resources

We provide a name, address, and phone number of someone who can be contacted for further information on the program. We also provide additional resources, other than the bibliography, which might be of interested to someone seeking more information about implementing the program.


We cite the references we used in reviewing the program and writing the summary for the PPN site.

When possible, each program summary was reviewed for comment by the program designer or lead organization.