This is another report from Marianna Bonanome and K. Andrew Parker at City Tech (NYC College of Technology). This report describes a leader board for the leveling and achievement features added to WeBWorK by Goeff Goehle.
The most reliable workflow for adding the leaderboards to an existing WeBWorK side is yet to be worked out, and perhaps simplified, so this is a chance for interested parties to get involved in development and/or in research as to the effectiveness of leaderboards and gamification in teaching mathematics.
The post is WeBWorK Leaderboards: From Experiment to Feature