"I think "immoral" is probably the wrong word to use...I prefer the word "unethical.""

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I believe it would be much better for everyone if children were given their start in education at home. No one understands a child as well as his mother, and children are so different that they need individual training and study. A teacher with a roomful of pupils cannot do this. At home, too, they are in their mothers care. She can keep them from learning immoral things from other children.

— Laura Ingalls Wilder