The following are sites that give their ideas on what to look for when deciding if a site is reputable and reliable.

American Library Association Criteria

Yahooligans - actually this site in itself goes against one of my criteria...it has advertising that distracts students.  

San Francisco Public Library - The Five W's

Ideas presented from Purdue University in Power Point format

Teaching sites, projects, quests

eduplace -a teaching activity for students

Kathy Schrock's surveys for students

Info Quest by Infosearcher