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EDS 825: Educational Policy and Practice: ERIC LibGuides
Use AND to narrow a search and retrieve records containing all of the words it separates, e.g. adolescents AND children will only find records containing both these words.
Use OR to broaden a search and retrieve records containing any of the words it separates, e.g.adolescents OR children will find records containing adolescents only, children only, or both words.
Use NOT to narrow a search and retrieve records that do not contain the term following it, e.g. adolescents NOT children will find records that contain adolescents, but will not contain the word children.