Can any school (any one) do it?

Generally, I'd say the answer is yes. Bees are great at finding their forage and fly up to three miles to find food. So, no matter if you are in town or country, your school should be able to keep bees.

There are a few limitations that I would suggest:
1. Make sure your neighbours will not be disturbed by the bees
2. Make sure you site the hives where children will not disturb or be disturbed by them

If those requisites can be fulfilled nothing should stop you from beekeeping.

Rooftop beekeeping is increasingly popular (photo from guardian.co.uk)