However, the primary reason that many children do not learn in a classroom is that the most important thing they have learned is that learning is unimportant. Any question that strays from the recommended curriculum is often either ignored or shot down. Honest questions or comments that don't fall within the party line can be cause for rude dismissal. I've never forgotten it, even after 38 years. My observations were too difficult for her to address, perhaps too unsettling.
Fifth graders can be so disruptive.
An objective approach, even if possible, would be far too lengthy for any school to include it. Most sciences, too, are full of subjective content. Anthropology, biology, zoology, astronomy, archeology and a myriad of others have religious and philosophical overtones and underpinnings, without which they would cease to be science. I can teach any of these from an atheistic, Christian or Muslim point of view, and while the facts might be the same, the hypotheses and purpose for learning would vary greatly depending on the outlook of the instructor. Even the most strident NEA supporters will not admit it publicly because it is so easily refuted, but there is an ongoing undercurrent that, without their brand of education, any child will fail in the pursuit of life.