I came across this and thought it was very useful. It's a very thorough article about test scores. The site is for special education advocacy and some of the stories will break your heart. The site also has a section on Advocacy 101 which I thought was helpful. I'm considering buying the book From Emotions to Advocacy. Has anyone read it and have comments?
http://www.wrightslaw.com/advoc/articles/tests_measurements.html