In the short term, there's just no way being a teacher in public education has any financial incentive.
Until you can pay a teacher the same salary as a silicon valley engineer, the best people will not be teachers.
Until you can pay a teacher the same salary as a silicon valley engineer, the best people will not be teachers.
If you imagine a really competent teacher sitting next to an engineer with the Khan Academy and intensely working with them and the statistics to produce a high-quality course, that's definitely the sort of thing that will command an SV engineer salary. There will be fewer such positions, but the immense societal gain of having these high-quality curricula propagated far and wide for cheap will far outweigh the fact there are fewer teaching jobs.
That was exactly my point, and our goal at Bloc :-)