Psygon

Psygon is an innovative new learning site where users can create and answer questions on a variety of subjects. 

As the lone back-end developer on the Psygon website, I built the site in Drupal 7 using Features and custom modules.  Working with Psygon's management, I helped to create a patent-pending algorithm for selecting the best next question to ask a user.  As users answer questions correctly, they get more difficult questions.  If they start getting questions wrong, they'll see easier questions.  The site also uses crowdsourcing to determine the quality of questions and shows the questions that users have upvoted as the best in a category.