The past two decades have been a period of active education reform throughout much of the world, and East Asia is no exception. This paper synthesizes findings from a series of empirical studies of educational reform in Thailand where an ambitious educational reform law was adopted in 1999. The purpose is to identify lessons learned about educational leadership and change that may be applicable both in Thailand and other parts of East Asia. The studies reveal successful reorientation of the nation's educational system around a new vision and education goals. However, the vision of change has been much slower to penetrate the daily practice of Thailand's 35,000 principals and 400,000 teachers. The paper identifies factors that are impacting successful reform in Thailand and draws implications for leading educational reform and change in the East Asia region.