DOAJ is an extensive index of diverse open access journals from around the world, offering freely available scholarly content online for everyone. Choose the Articles option and type your topic into the search box. Next to your search results you will see these options for refining results:
Education Resources Information Center (ERIC)
Online library of education research and information, sponsored by the Institute of Education Sciences (IES) of the U.S. Department of Education.
PubMed Central (PMC)
Free full-text archive of biomedical & life sciences journal.
Public Library of Science (PLOS)
PLOS empowers researchers to make science immediately and publicly available online, without restrictions.
Social Sciences Research Network (SSRN)
Access to over a million research papers from researchers in more than 70 disciplines.devoted to the rapid worldwide dissemination of research.
Stanford Encyclopedia of Philosophy
Find articles about philosophical concepts and philosophers by leading scholars in the field.