Comment by marcosdumay

The article claims that teaching "money math" on a whiteboard that lacks any relation to real money won't make students learn financial literacy and the time wasted there should be replaced by something else.

There is also a serious implication that "hey, students didn't have enough time to learn math, maybe we could add the time to it". But it's an almost irrelevant side point, and I got from it that the author would be perfectly fine with teaching real financial literacy instead too.

So, yes, you seem to have misunderstood it.