There is nothing more extraordinary in the educational world at the present day than the change of attitude among teachers towards the subject they have to teach. Teachers of bygone ages were to a large extent content to regard their pupils as so many buckets into which they were required to pour a prescribed amount of intellectual material. In most cases the teacher did not know himself the sources whence came his stock-in-trade. He had so many hard facts at his disposal which he had either got out of a printed text-book or from lecture notes, and it was his business according to his genius and ability to breathe upon these dry bones that they should live.