Did she ever actually teach math in her class?
The whole find numbers in nature is cute (if you're five) but what about actually teaching them something useful!
Her life and teaching style seems more similar to Numerology (more specifically of Chinese influence) than any actual math.
Just because she's a arithmomaniac (obsessed with numbers) doesn't mean she likes math. You can simply like numbers or you can use them to prove things. I don't recall her doing the latter.