There are thousands of books, magazines and web sites about critical thinking. Once we have discovered them, we will use critical thinking techniques to decide which ones belong here, and which ones don’t - and we’ll tell you why.

For example;

http://www.criticalthinking.org is a nonprofit website about Critical Thinking. It’s intended audience is adult, so the material may be a bit hard for kids.

http://www.criticalthinking.com is a company that sells books, magazines, tests and other material for teachers and parents. Are they more or less trustworthy than the .ORG people? Why?