it is not so much they don't realise it, but there just is not the money to do it.My local County council voted to fit sprinklers in all schools,then when they were told how much it would cost they had to review that so that now hardly any new build will have them-exceptional circumstances only-maybe for instance a 'special' school for difficult children.The L.A I work with has over 500 schools- it just does not have the capital.The cost of doing it to every school would out weigh its potential fire losses, how ever costly/tragic that is for the individual school concerned.You also have to look at how schools are funded now-most of the money goes straight to the school,and not the L.A.- and they don't want to spend 50/100/150k (which they don't have anyway) on a sprinkler system-they want computers/staff/internal alterations etc etc.Thats why more needs to be done by the government if they want sprinklers in schools-provide the money/trade offs or legislate.