After a year when 34% of college freshmen did not return to the same school for their sophomore year, the highest attrition rate in 20 years, Purdue University in Indiana, has turned its attention to student retention. Administrators at Purdue have responded to the nationwide concern about attrition and the high costs of university tuition by investing in an online tool that helps students self-monitor their academic performance, called "Signals" which helps improve college retention rates.