how much is a good teacher worth?

You don't want to know.

The cost for such teachers generally runs $70 to $110 an hour. And depending on how many hours a teacher works, and how many teachers are involved, the price can equal or surpass tuition in the upper echelon of private schools in New York City or Los Angeles, where $30,000 a year is not unheard of.

Okay, maybe you do want to know.

Let's use estimates that are nice and modest. 180 days, 5 hours per day, $70 per hour.

You don't want to know how much that is. You really don't.

You do?

$63,000.

And that's a modest estimate.