MILLION DOLLAR BABY: Coursera announced that its Signature Track program, which allows students to earn official certificates for courses, has surpassed 25,000 signups and $1 million in revenue. The Palo Alto-based MOOC started the program in January, and by April reported $220K in earnings. At the time of writing, Coursera has 94 courses that offer Signature Track certificates, which each cost $39 to $49.
