There is a typo in my original post. It should have read "Unless students
are given <tasks>..." The "s" in "tasks" got relaced by an "l", giving
the post a completely unintended meaning.
Regards,
Jack
--
"Trust me. I have a lot of experience at this."
General Custer's unremembered message to his men,
just before leading them into the Little Big Horn Valley