Try different forms of the subject word being searched such as "Pill Bugs" and "Pillbugs."
Select the broader form of a subject such as "Plants" and browse through the list of subheadings to locate a more specific subject such as "Plants - Dissection."
Search a singular or truncated subject word to retrieve all forms of a subject heading. For example, search "Plant" to find both "Plant" and "Plants." A search for "Biolog" will locate "Biological" as well as "Biology."
When searching a subject with a subheading such as "Plants - Drying," type two spaces before the dash and one space after it.
Note: The Science Fair Project Index uses a controlled vocabulary derived from the Library of Congress Subject Headings. The editors have made modifications and additions to the subject headings when the Library of Congress either does not have a suitable heading to describe a project or uses terminology unfamiliar to most students. "See" references direct the user to preferred subject headings, while "see also" references direct the user to related subject headings to explore.