Hmmmm, Cadbury - I am surprised thet someone whom so openly prides himself on being erudite and sophisticated would continue to make simple grammatical errors.
Saying "all of them years" instead of "all of those years" is using the "hillbilly" English which you so despise.
Also, you not only ended a sentence in a preposition, you used the wrong one. A person is schooled "in" a subject, not "on" a subject. In order to aviod ending a sentence in a preposition, you should have said, "Is there anything else in which I may school you?"
Now, if you'll excuse me, it sounds as if the hounds have treed a coon, so I'll be getting dinner going as soon as I check the still.