Here are three sites for further information on the Pyramids:
There are several excellent accounts in Smarthistory: http://smarthistory.khanacademy.org/the-great-pyramids-of-giza-and-the-great-sphinx.html
“Building the Great Pyradmid,” by Dr. Ian Shaw, University of Liverpool: http://www.bbc.co.uk/history/ancient/egyptians/great_pyramid_01.shtml
And from e-how (thank you, Joe!): http://www.ehow.com/about_6525585_did-egyptians-make-pyramids_.html
Keep in mind…there are still mysteries here to be solved and many controversial interpretations. They are amazing structures!