Students starting school this year may be part of the last generation for which "going to college" means packing up, getting a dorm room and listening to tenured (终身的) professors. Undergraduate education is on the verge of a radical reordering. Colleges, like newspapers, will be torn apart by new ways of sharing information enabled by the Internet. The business model that sustained private U.S. colleges cannot survive. The real force for change is the market: Online classes are just cheaper to produce. Community colleges and for-profit education entrepreneurs are already experimenting with dorm-free, commute-free options. Distance-learning technology will keep improving. Innovators have yet to tap the potential of the aggregator (信息汇集公司) to change the way students earn a degree,making the education business today look like the news business around 1999. And as major universities offer