O.K. Then in economics and public affairs, let's "balance" capitalist principles with instruction in communism. And of course we must "balance" consensual values of Western Liberalism with Sharia Law.
The notion that "balance" is a good for it's own sake is necessarily a RELATIVIST value.
How about we just inform students as honestly as possible about the ACTUAL content of science. At such time as some non-evolutionary theory may earn standing in the marketplace of scientific ideas on merit, then by all means teach it. Any time there is an actual scientific debate, then tell students about all sides thereof. But when one theory is ascendant, and has no viable contenders, academic (and simple intellectual) integrity requires that you tell students that too.
I will not claim to be an expert on Ayn Rand or her philosophy of Relativism but I wonder if that is where you are coming from.
Indeed the educators in our culture should be teaching about communism and other things you mentioned.
It is so freaking stupid to ignore the very notions and beliefs which have been instrumental in shaping the reality that we 21st century dwellers actually abide in.
Instead we get kids in Massachusetts reading fairy tales about the Prince who found his Prince, and methods of engaging in fisting, and other forms of sexual behaviors. Public Schools are a mess because they don't teach our kids about relevant things that are balanced.
All that while little Jimmy and little Nancy are are indoctrinated by a bunch of union radicals who swear every year it seems that they are underpaid, overworked, and not in it for the money. Please name another vocation with 14 or so weeks off every year for me.
Oh, and please not the US Congress. I'm not interested in that. I'd like to think that I might have a chance to get to Heaven when I die.