Use a combination of keywords for your search terms: ex. full day preschool, teaching reading and early childhood, early childhood intervention
Filters are your friend! every database has filters for source type, subject, language, and date range. Using those will give you fewer results to sort through
Look at the number of pages. If an article is over 10 pages, it is probably no appropriate for this assignment. Check before your commit.
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Search for articles in specific education journals
Extensive index to educational literature containing some 1.5 million items, including journal articles, unpublished documents, research reports, and curricular materials. Tutorial