Generally, sites that end in .edu or .gov are reliable sources of information.
Sites that end in .org are run by organizations that most likely have an agenda, so you will have to be careful to check for bias.
For sites that end in .com, you will always have to evaluate the authenticity of the information you find there.
You may use the Google Scholar search box below to access scholarly literature (mainly journal articles) for your academic research.
To search for results only with a certain domain (such as .edu or .gov):
In the search bar type:
To search for a specific file type, pdf, xls, doc, ppt, ...
"undocumented immigrants" filetype:pdf
egyptian pyramids filetype:ppt
Use limits like intitle: or intext: to focus your search results
intitle:voter (the word voter must be in the title of the page)
allintitle:voter fraud (the words voter & fraud must appear in the title of the page)