The Japanese school system primarily consists of six-year elementary schools, three-year junior high schools and three-year high schools, followed by a two-or-three-year junior colleges or a four-year colleges. Compulsory education lasts for 9 years through elementary and junior high school. Public schools in Japan have classes five days a week, from Monday to Friday. There are also schools that have classes on Saturday. In junior high and high schools, there are six class periods each day, typically lasting 50 minutes for each. After classes, students clean the classrooms in shifts and then start their club activities. There are a variety of clubs such as cultural and sports ones. In principle, the school year begins in April and ends in March of the following year. Most schools adopt a three-semester system, with the first semester from April to August, the second semester from September to December, and the third semester from January to March. There is also a summer break (from the end of July to the end of August), a winter break (from the end of December to the beginning of January), and a spring break (from the end of March to the beginning of April). Each school has a principal, a vice principal, teachers, a school nurse, and other administration staff. As the chief executive, the principal assumes all responsibilities of the school, including the courses provided and related administrative work. The vice principal supports the principal to manage administrative affairs of the school and to be in charge of student’s educational activities and curriculum as well. Furthermore, in order to ensure school’s smooth operation, teachers take on various responsibilities, such as taking care of educational activities, students’school life, and employment guidance for students after graduation. Many schools also establish their own committees, for example a International Exchange Promotion Committee, and others. The level of Japanese education is high even by world standards. In OECD’s Programme for International Student Assessment (PISA) aimed at fifteen-year-olds, Japanese students recorded high levels of achievement, particularly in science related areas. Educational activities outside of school also flourish, and programs leading to advanced education are implemented.Enrollment in high schools, the second-half of secondary education, reaches over 90%, and the enrollments in college are also high reaching over 50%. Admission to high schools and colleges is mainly through entrance exams, held from January to March.