Due to the Federal Government sequester, my favorite publicly accessible interface to the ERIC aka "Education Research Information Clearinghouse" database is not working. In place of using the awesome http://eric.ed.gov website, I recommend the first of the following two vendor platform options. Especially notice how they each handle searches that utilize the ERIC Thesaurus (which I highly recommend you use for precise and powerful searching.)
As many of you are aware, the ERIC.ed.gov website sponsored by the US Department of Education has suspended access to many of its user-contributed, full-text documents - those with accession numbers starting with the letters "ED." This was done to isolate and begin removing sensitive personal information found in some portion of the older documents that had previously been available on microfiche.