It may be a week late, but this is probably the best April fools' prank we've seen this year.

The video was shot in a classroom at Aquinas College in Grand Rapids, Mich.

This macroeconomics professor has one rule in his class: If your cell phone rings, you have to answer it on speaker phone and deal with the embarrassment.

This girl used the professor's rule to her advantage and did so brilliantly.