St. Joseph's Institution (SJI) is a Catholic secondary school for boys founded in 1852 by the Brothers of the Christian Schools or De La Salle Brothers. It is the 3rd oldest secondary school in Singapore.
SJI offers a dual track education comprising the 'O'-level Programme (OP) and the Integrated Programme (IP) track. The IP track which leads to the International Baccalaureate (IB) Diploma Programme (IBDP) integrates the 4-year secondary education with a 2-year IBDP, where IP students can proceed onto the 2-year IBDP without the need to complete the O-level examinations at the end of their 4th year. The OP students will complete their GCE 'O' level examinations at the end of their 4th year. Based on their O-level examination results, they can apply to continue the IBDP at SJI, or pursue courses at other junior colleges or polytechnics.