The education system in the Czech Republic includes preschool, primary school, secondary school, university, and continuing education. Preschool is for ages 3-6 and focuses on social and cognitive development. Primary school is for ages 6-15, is usually state-run and free, and covers nine years of compulsory education. Students are assessed on a scale of 1 to 5, and those scoring a 5 in all subjects must retake exams to advance to the next grade level.