Being a smart searcher can save you time. Below are some tips to make your searching more productive....
Use quotations for phrases and linked words like "high school" or "digital divide"
Use a minus sign (with no spaces after it) to removes items. Adding -"college students" would exclude sites with that phrase.
Limit to specific domains by adding site:org (or site:edu, or site:gov) to your search.This also works for more specific domains like .utexas.edu or austintexas.gov.
Limit to PDF results if you're hoping to find reports and publications by adding filetype:pdf to your search phrase.
After you've run your search, you can use the "Tools" to limit to results from the last week/month/year or to a custom time period.
