Off the record;Diary
The censor was less vigilant when John's pupils logged on to another site. "They got specific instructions - and diagrams - on how to inject themselves with heroin," he said.
They weren't the only ones - an Edinburgh teacher found tips on rolling joints. But the last word must go to Bruce Kerr, technology teacher from Dumfries and Galloway, who warned the conference: "If you're into astronomy and look up Uranus, you're in for a shock."