Mises.org for articles, books, audio, etc., from the Austrian School of Economics;
LewRockwell.com for the best in Libertarian thought;
FreeBooks.com for the free books on Christian thought from Gary North, et. al.;
PeytonWolcott.com for stories on education accountability.
Like a spider web, these sites link to other sites that can provide additional articles and knowledge. You'll soon find FEE.org, FFF.org, EdNew.org, the Education Consumers Clearinghouse, and many others. Have fun surfing...