<https://www.edsurge.com/news/2014-12-20-how-to-engage-the-students-who-need-it-most-gamification>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.edsurge.com/news/2014-12-20-how-to-engage-the-students-who-need-it-most-gamification>