Ten million people have visited a university website to access free course material since it opened three years ago. The Open University said its OpenLearn site had resulted in 13,000 course registrations. It offers material equating to more than 8,000 e-learning hours in 12 subject areas covering all levels from access to postgraduate education. Law, creative writing, study skills, business and plate tectonics are the most popular materials on the site. About half of users are from the UK and a quarter hail from the US.