ERIC
Education Resources Information Center
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"ERIC - the Education Resources Information Center - is an online digital library of education research and information. ERIC is sponsored by the Institute of Education Sciences (IES) of the U.S. Department of Education. ERIC provides ready access to education literature to support the use of educational research and information to improve practice in learning, teaching, educational decision-making, and research."
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Does not necessarily give free full text access. Please check Search USA for USA's access to a particular journal.