Critical thinking is taught in schools. When I think back far enough to my daughter's elementary school education, teachers were trying to develop it by at least 4th grade (9-10yo). Starting the next year, she had classes in civics that continued through to high school (14-18yo) where she is now. As I write this comment, her world history class is discussing yesterday's events in DC in a point/counter-point fashion.
Despite the effort to develop critical thinking skills, a small but not insignificant number of students parrot what they watch on questionable news outlets.
Despite the effort to develop critical thinking skills, a small but not insignificant number of students parrot what they watch on questionable news outlets.