12. Article | Published in TESS on 16 September, 2005 | By: Douglas Blane "It's a useful tool," says Ollie Bray, principal teacher of geography at Dunbar Grammar, East Lothian. "You get instant feedback from all the pupils, which lets you see if some haven't understood and responded appropriately. It would be nice though if you could do a little more than asking questions that only have Yes/No or a/b/c/d answers."