When was the last time you learnt something without being surprised?
The same facts can be presented in several ways. A science teacher could choose to tell his students how the human body has evolved the unique ability to sweat and cool itself. Or with a little creativity, he can surprise them by telling them how on a hot day, a human athlete is capable of outrunning a horse, thanks to our peculiar power to perspire.
Our best teachers are often those who can transform the mundane facts from a text book into surprising truths.