Complex sentence: The former Oakburn College campus, on Elphin Road, in 1979 became home to the Matriculation classes (years 11 and 12) and the junior school (years K-6) and boarding house (boarding school).
Split into simpler sentences: The former Oakburn College campus, on Elphin Road, in 1979 became home to the Matriculation classes (years 11 and 12) and the junior school (years K-6) and boarding house. The Elphin Campus is home to the primary school and boarding house (boarding school).