Romania's educational system requires initial teacher training of 3-2 years for secondary education and 3 years for preschool and primary levels. Teachers must complete professional development including job confirmation, didactic grades, and accredited courses every 5 years. The national curriculum consists of 7 areas including a core curriculum and differentiated curriculum for grades 9-10 and 11-12. Class sizes range from 15 to 30 students. The school year is 35-37 weeks from September to June with national exams at various grade levels and a graduation exam at the end of grade 12. Legal provisions establish education as a right and rule frameworks for schools while allowing some flexibility.