Currently many documents are unavailable from ERIC. ERIC took down a significant amount of content because they discovered sensitive personal information, such as social security numbers, in older ERIC documents. They are in the process of reviewing every document to strip out any sensitive or personal information before reposting on their servers. The full explanation from ERIC is available here.
For ERIC documents that are currently unavailable, please request them through the library’s interlibrary loan service. We have agreements with other libraries and our interlibrary loan department has been able to obtain copies of the ERIC materials relatively quickly. Alternatively, some of the documents have also been published as books so they may be available through Prospector or Google.