The vmbo (voorbereidend middelbaar beroepsonderwijs, literally, "preparatory middle-level vocational education") education is a school track in the Netherlands. It lasts four years, from the age of twelve to sixteen. It combines vocational training with theoretical education in languages, mathematics, history, arts and sciences. Sixty percent of students nationally are enrolled in vmbo. The vmbo has four different levels, in each a different mix of practical vocational training and theoretical education is combined.