This is textbook PR, literally from the first word. The headline is crafted specifically to engender resentment and outrage.

The intention is to reinforce the counterfactual narrative that teachers in the US are overpaid, which is needed to depress opposition to the looting of public school systems.

Now, a market for lesson plans is interesting - and I'm much happier with money going to entrepreneurial teachers actually creating content that might otherwise end up in the pockets of the Blackstone Group or Holtzbrinck - but the real point of this article has more to do with parochial politics.