What is ‘critical’ about critical thinking?

Most schools promote ‘critical thinking’; most teachers say they encourage it. Most schools, most teachers, do quite the opposite, and actually enforce closed-minded thinking. This discussion will discuss why this is (short answer – it is built into the ideological ‘architecture’ of schools), how it happens (short answer – everything that happens in schools ensures it), what (if anything) we can do about it (short answer – nothing), and why it is the only thing we should be concerned about.