This guy is interesting. He is a scientist who, while jumping all over the place in his talk, has some interesting stuff to say about science education. He demonstrates a prac that he does with his year 8's where they approximately measure the speed of sound. He also is of the opinion that we should get computers out of schools rather than get more into schools, he doesn't really elaborate on this point however i plan on searching the web for more material featuring him as it may be of theoretical interest for this subject.