"The person who makes plans and the person who fails to carry them out are not really the same person: they’re different parts of what the game theorist Thomas Schelling called 'the divided self.' Schelling proposes that we think of ourselves not as unified selves but as different beings, jostling, contending, and bargaining for control."
Read more http://www.newyorker.com/arts/critics/books/2010/10/11/101011crbo_books_surow...
Definitely worth bringing to your school.