I'm not quite a BBC Controller, but being the lead on Planet eStream selecting the content that comes onto the college network it supports feels a little like that. I run through some 24 subject areas vacuuming up content that I believe will be of interest to teachers and their students. A few teachers are getting involved too. These programmes can be edited, put into playlists, have slides added and even be turned into interactive quizzes.
The skill lies in the ability of the teacher to integrate it into their learning schedule.
We need to find a way to let students see the Electronic Programme Guide: 70+ channels, all terrestrial, many European and radio too, and some public broadcasters from North America.