Twin System of a Successful Charter School and Policy Implications

American charter schools are independent public schools of choice, freed from rules but accountable for results. Charter schools have celebrated the 25th anniversary of its creation in 2017 and become part of landscape of public education in America. However, little research has been conducted on an individual charter school. This study aimed to examine the major factors of a successful charter school. A qualitative approach was employed. Seven one-hour in-depth interviews were conducted with semi-structured interview questions. And four teachers were participated. The conclusions are as follows: First, there is the combination of system and cultural factors as major successful factors of the Dayton Early College Academy. Second, system factors are the gateways and the advisory that is a twin at the charter school. The findings are considered to be applied for Korean educational settings and the implications can be used for policy development in Korea.