Anoble woman educated her children. why was a peasant woman less likely to teach her own children?

The peasant would be less educated herself and unable to teach her children. While a noble was probably rich or had a decent amount of money and was educated as a child therefore able to educate her children/child.

Because some of the peasant womens are less educated and had lot of chores to do.

Yes it has . that is why fake news is such an issue