| An incentive for the teachers is better than no incentive. I recall a case at a company I worked for. They snagged a major contract with IBM, but it had a tight deadline. They hired a team of 6 or 7 greybeards to do the work. The fun thing was they each got a $10,000 bonus if delivered on time. They delivered it on time, got the $10 grand each (a lot of money in those days), IBM was happy, all good. So I asked them, did the $10 grand bonus motivate them to get it done on time? They were offended, saying they were professionals and would have worked just as hard without it. I laughed, and didn't buy it. Do you? Here's another case. There was an earthquake in LA, and one of the cloverleaf freeway interchanges fell down. They contracted out the job with a tight deadline, and a bonus of ONE MILLION BUCKS per day it was finished ahead of schedule. It was finished several weeks ahead. Ka-ching! Money talks, BS walks. |
The examples you give are straightforward. You already have a bunch of people who know how to do a job, so you pay them to do it quickly. Basically you are giving them money to go and tell their families they are going to be working late for a while and they have to postpone their holidays. These are both examples of a simple task with a definable, specific goal. Everyone can tell when the junction is built.
With this teaching math thing, there is no finish line. The people who decide if the kids pass are... teachers. Grading your own work is not going to lead to healthy outcomes. You want to adjust for how easy the task is because you don't want easy classes to get paid and difficult classes to be excluded from getting the bonus. But then who defines the baseline? Teachers again. Maybe not the exact same teachers but they are all part of the same system.
Finally there's the problem of feedback. Incentives work when the person who is incentivized knows how things are going and knows how to change the outcome. It is not clear at all that teachers know that if they just show Billy Bob the times tables as a rhyme then he will pass his test. It is not clear at all that teachers even know whether Billy Bob understands the times tables, or is just repeating what is being said.
This is the problem with all incentive engineering schemes. I'm an engineer too and I wish it were simple. But the history of it is rife with all sorts of catastrophes.