“Other countries with the most sleep-deprived youngsters were New Zealand, Saudi Arabia, Australia, England, Ireland and France.” (Source BBC see below)
On occasion students do indeed fall asleep in class, especially after a tough PE session or staying up all night. If it is that bad I either leave them or send them to sick bay. Anything else is just wasting time (and more akin to torture). Obviously if this is something that happens regularly then the issue needs to be escalated to Deans/Home The following BBC news report makes for interesting reading.