Coursera, the venture-funded startup founded by two Stanford professors that has enrolled 2.5 million students in free online courses created in partnership with 33 prestigious universities, announced yesterday that five of its courses will become eligible for actual credit toward a real college degree. The move comes in the midst of the most embarrassing week in the company's short history, as one of its courses, with 41,000 students, had to shut down amid technical glitches.