Let the database thesaurus be your guide!
Many databases offer a Thesaurus or dictionary of subject terms. Look for the link at the top of the database screen.You will also see subject terms on the side of the results screen or on the abstract screen. Here are some examples:
ERIC: Search the Database
Sample Search: inclusive schools and (controvers* OR opposition OR challenge OR advantage OR disadvantage OR debate)
ProQuest Education Journals: Search the Database
Sample Search: "english as a second language" OR "bilingual education") AND "academic achievement"
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