The nursery schools and the kindergartens are the first-level education forms. However, they are not compulsory. The children start attending the primary school at age 7, where educational programs last for 4 years; then they must start attending secondary school (5th to 10th grades). After finishing 8th or 10th grade, the student can continue learning at the high school or choose courses at the vocational college. The students who finish the high school can join colleges and universities. Higher education is free for the students whose annual median of grades is 8 or higher. The others have to pay 500 Litas per semester at least.