Some applications are well suited to the Internet. Those which are communication and information rich are often ideal.
Adult education is one such application.
Good education involves communication between people and there is body of knowledge associated with it. This form of education is likely to become a significant industry in the next few years. The challenge is to provide quality education experiences. They now allow people to sell their courses. This would be an interesting place to work as they try to determine how best to establish quality control and build up a repertoire of good courses.