The Italian school system is highly centralized, with compulsory education running from ages 6 to 15. After middle school, students can choose between lycaeums (classical or scientific high schools preparing for university), technical high schools focusing on industries like engineering and commerce, or vocational high schools. High schools last 5 years and conclude with a national exam. Students generally remain in the same classroom with the same group of peers and rotating teachers for several years at each school level.