In the United States, education is offered at all levels from pre-kindergarten to graduate school. Elementary and secondary education involves twelve years of schooling the successful completion of which leads to a high school diploma. A distinct feature of the American educational system is its decentralized organization. Three levels of government - local, state, and federal financially support elementary and secondary education. Furthermore, it is divided into public and private institutions. The main disadvantage of decentralization is the quality of education received by some of the stude