My mother-in-law taught in the 40s and loved it. She went back to teaching in the 70s and felt she had to interrupt the class for two weeks to give the kids a brush-up grammar course, but was reprimanded by the school for doing so! She finished out the year then quit. Such a shame.

That said, my grandmother couldn't spell worth a dime and had terrible grammar. I loved her beyond all measure and would take her brand of wisdom and experience over my fancy-pants-educated one any day. Love is better than spelling (but spelling is good too).