“I don’t need to. I was there and went to school.”
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Well, that’s just silly. Your personal claim about what you learned in school, even if you are remembering it and relating it correctly, tells us nothing about “what most children were taught.” That’s why it would be helpful to find some old textbooks or other sources to confirm that what you think you remember was actually the prevailing view at the time.
You’ve made a general assertion and have provided nothing but personal anecdotal evidence to back it up. If you want to say it’s my responsibility to disprove what you said, knock yourself out.
But logic like that seldom impresses anyone. People know how to recognize unsupported claims.