Yes, but often times the army of scientists had already done their work. Even in the late 90's a lot of what I was learning was already known to be false but the updates hadn't yet hit by textbooks published in 1982. The teachers even sometimes already knew it to be wrong but had to teach it anyway because it was still considered part of the state curriculum. But the more common and larger issue was the partial truths/mostly lies - even if some of the lies are arguably justified to make learning easier for some kids. The better teachers wouldn't lie but would simply say "You'll be taught about that later in a higher grade".