There's an important distinction here; between instruction and teaching. As Tony Bates pointed out recently (My summer paranoia: computers will replace teachers in higher education), instruction is easily automated/recorded whereas teaching is a pedagogical process that requires human contact and interaction. Both sides are needed in education but maybe we need different types of educators: the experts and enthusiasts who are good at instruction and the teachers who provide the context, guidance, mentorship, depth and discussion. Teachers have so far been expected to do both tasks but maybe we're seeing a new division of labour. The teacher is not being replaced by a computer but the computer is helping to make the difference between teaching and instruction clearer.
Alastair Creelman reflekterer over suksessen til Khan Academy