The Greek educational system is centralized and overseen by the Ministry of Education. It consists of pre-primary, primary, secondary, and higher education levels. Pre-primary is for ages 5-6 and primary is compulsory for ages 6-12, consisting of 6 years of elementary school. Secondary education is divided into junior high from ages 12-15 and higher secondary from ages 15-18, where students specialize in areas like sciences or arts. Higher education consists of universities, polytechnics, and other specialized institutions where courses typically last 4 years. The educational system aims to provide free public education for all students and a solid foundation in core subjects like Greek, math, and English.