Before most big protests last year, activists produced and distributed maps listing various locations that protesters might have an interest in. No-one seems to have done that for any of the student protests this time round, which is a shame. Having your eye on lots and lots of different places is a lot more sensible than just concentrating on one easily-guarded spot. I don't have the technical skills or the resources to research, design, print off and distribute such a map myself, but if any of you are able to, it might be a good idea.
Here's the original "Squaring up to the Square Mile" G20 map:  http://www.indymedia.org.uk/en/2009/03/425118.html
and these maps were produced before DSEi:  http://www.dsei.org/wp-content/uploads/2009/09/dsei_city_map_websmall.jpg
and Climate Camp:  http://london.indymedia.org/articles/1920Climate
respectively. Obviously, none of them are entirely suited to protests about education, but they're still better than nothing. Might be worth having a look and seeing if anything catches your eye.