when i was a kid doing science in school - we used to have a row of little bottles on every desk - hydrochloric acid, nitric acid, sodium hydroxide, sulphuric acid....and something else.

they don't do that nowadays.
the general trend is to make classrooms with less possible hazards.

in America, they're talking about having guns in the classroom.

what a fascinating country. they must be totally different to England.

In England many school age children are mischievous. They would plot to get hold of the gun. Also many teachers are on the edge of a nervous breakdown - they could start shooting.

i suppose with so many guns about - Americans are polite to each other, just to be on the safe side.