Critical Thinking Is Best Taught Outside the Classroom
Critical thinking is a teachable skill best taught outside the K–12 classroom
"Museums and other institutions of informal learning may be better suited to teach this skill than elementary and secondary schools.
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Informal learning environments tolerate failure better than schools. Perhaps many teachers have too little time to allow students to form and pursue their own questions and too much ground to cover in the curriculum and for standardized tests. But people must acquire this skill somewhere. Our society depends on them being able to make critical decisions, about their own medical treatment, say, or what we must do about global energy needs and demands. For that, we have a robust informal learning system that eschews grades, takes all comers, and is available even on holidays and weekends."
http://www.scientificamerican.com/article/critical-thinking-best-taught-outside-classroom/