ERIC - Education Resources Information Center - is a digital library of education research sponsored by the Institute of Education Sciences (U.S. Dept. of Education). Its contents includes full-text or abstracts for journal articles, research syntheses, conference papers, technical reports, dissertations, and policy papers.
PubMed is a database of the National Institute of Health and U.S. National Library of Medicine. You can:
use simple or advanced searching
keyword or Medical Subject Headings (MeSH)
create an account for saving articles or creating alerts
Google Scholar is not a database. It's a search engine (Google) that targets scholarly or educational resources. This means it can find articles not listed in our databases like:
Open access journals
Abstracts on journal websites (use interlibrary loan if we do not carry the article)
However, it also will find non-scholarly sources like: