"Leave your G.P.A., your SATs, your recommendations at home," said Anant Agarwal, the chief executive of edX. "If you have the will to learn, just bring your Internet connection and yourself, and you can get a year of college credit." Arizona State University, a leader in online education, and edX, a non-profit online venture founded by M.I.T. and Harvard, have banned together to offer an opportunity for learners to earn college credits online and only pay for those credits if they finish and pass each course. NYT reporter Tamar Lewin takes a closer look at yet another innovative partnership and approach in higher education.