This is a Building Block search strategy. It starts with single concept searches that usually result in a very large number of hits. When all of the single concept searches are completed, they are combined using Boolean operators. This narrows the topic and reduces the number of hits.
Database Used: ERIC/FirstSearch
Search Topic: Changing Role of the Elementary School Librarian
Concept search #1: (role change) OR (position change)
Results = 30,155 hits
Results = 403,506 hits
Results = 5,353 hits
Results = 102 hits