"The Campbell Collaboration is an international research network that produces systematic reviews of the effects of social interventions in Crime & Justice, Education, International Development, and Social Welfare." These reviews are freely available on the Internet.
To find systematic reviews and meta analyses, use the Advanced Search page. Type your search terms in the search box. Then, scroll down to the Publication Type limiter box and choose Meta Analysis or Systematic Review.
To find meta analyses or systematic reviews, use the Advanced Search. Type your search terms in the search boxes. Then, scroll down to the Methodology box and choose either Systematic Review or Meta Analysis
A free database of clinical guidelines, including systematic reviews. Type your search terms in the search box. In the left column of the results page choose "Systematic reviews" in the list of Article Types.
Use the Advanced Search page. Type your search terms in the search box(es). Then, either click in the the box next to Evidence-Based Practice or scroll down to the Special Interest box and choose Evidence-Based Practice.
To limit your search to evidence-based practice resources, type your search term in one of the search boxes. Then, type "evidence-based practice" in another search box and change the Select-a-Field to "SU Subjects".