Education system design issue

Research says the top quartile teacher will increase the performance of their class by over 10% in one single year. Awesome! What are, then, the characteristics of this top quartile?

Very senior teachers? No. Once somebody has taught for 3 years, their teaching quality does not change thereafter.

Maybe teachers with masters degrees? No. According to research, masters degrees have no effect at all in teaching quality.

You might be thinking: the way the pay system works in most countries rewards these two things: seniority and master degrees. What really matters, though, is not any of those. What makes the difference is past performance. Doesn't that make sense? If someone continuously proves s/he is competent at engaging students to learn, s/he will probably have a good performance engaging more students in the future.

Well, classic example of a unintelligent design, which does not see the whole system, does not reinforce desired behaviours and does not naturally create conditions for improvement, i.e. increasing whole classes' performance by 10% every year.

More on Education? Check the provocative TED talk which inspired this post.