Evaluating Websites:

Univ. of Wisconsin-Madison Libraries' "Checklist for Evaluating Web Sites" http://www.library.wisc.edu/instruction/instmat/webeval.htm
Easy to use and makes a great hand-out for classes.

Beck, Susan. The Good, The Bad & The Ugly: or, Why It’s a Good Idea to Evaluate Web Sources.  1997.  http://lib.nmsu.edu/instruction/eval.html

Univ. of California Berkeley Library has a series of useful pages about evaluating websites:

"Web Page Evaluation Checklist," by Joe Barker
http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/EvalForm.pdf
A downloadable form version of a checklist

"Evaluating Web Pages: Experience Why it is Important," by Joe Barker
http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/Evaluate.html
Includes several groups of sites on the same topics, with tips on evaluating them

"Critical Evaluation of Resources," by M. Phillips
http://www.lib.berkeley.edu/TeachingLib/Guides/Evaluation.html
Applies evaluation criteria to books, articles, and websites.

Understanding and Evaluating Search Engines:

Univ. of Wisconsin-Madison Libraries' "WWW Search Strategies," by Barbara Lazewski:
http://www.library.wisc.edu/libraries/Steenbock/instruct/wwwstrategies.htm
Includes information about search engines, databases, and more.

"The Best Search Engines," by Joe Barker
http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/SearchEngines.html

"Google – the BEST search engine (almost always)," by Joe Barker
http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/Google.html

Search Engines Feature Chart, by Greg R. Notess
http://www.searchengineshowdown.com/features/

Concise chart comparing how major search engines handle AND/OR/NOT, truncation, sorting, and more. Includes links to longer reviews of each search engine.