But as the millennium dawns, the private sector is poised to play a much larger role. ''This is the infancy of a new education industry,'' says Douglas Becker, president and co-CEO of Sylvan Learning Systems (SLVN), which runs the nation's largest network of tutoring centers. The advent of the knowledge economy, combined with mounting dissatisfaction with the dismal state of many public schools, is creating vast openings for for-profit companies. They're doing everything from running elementary and secondary schools to conducting corporate training for companies that traditionally taught employees in-house. Simultaneously, the Internet is changing the way much education is delivered. ''2000 will be the year when the revolution will become very visible,'' predicts Michael Moe, an analyst at Merrill Lynch & Co.