The Funny part is that there IS a ton of other stuff being taught in schools as "facts" that's often completely disproved years later. Two hundred years ago kids were taught that the earth was flat even though there was no proof of this. It was just an assumed "fact" based on some flawed theories and observations. Now a days, if you take a psychology class you are taught that depression is caused by low serotonin in the brain and schizophrenia is caused by high dopamine in the brain. If you actually do some research yourself you will learn that there is absolutely zero proof of this and in fact, those statements are probably completely false. Also, History is taught by the Victor. I wonder how much of what you learn in history class is BS and the "triumphant hero" was actually the oppressing tyrant.
Now I don't have kids so really, my opinion on this means nothing but I think teaching your kids to question everything they are taught is probably one of the best things you can do. School for the most part doesn't teach kids to think for themselves. It simply teaches them sets of rules and how to be a good citizen and follow them to a tee. No one ever became great following the rules 100% of the time.