I think this is a perfect example of why people find math hard. Not because there's something inherently difficult, but because we have teachers like this one in charge of open and curious minds at a young age. You get a teacher who doesn't quite understand what it is she's trying to teach, and this confusion is multiplied over and over again for each batch of students that pass through. Not too long afterwards you get kids who think they don't understand math, when in fact it was a failing of the teachers who couldn't correctly explain it in the first place.