as early as 1902 when it was opened as a tributary normal school with secondary school instruction. In 1916, it was a secondary school complete with elementary and training departments. It was only, however, in 1924, with the completion of its main building (now Quezon Hall) and the laboratory school building when INS became a distinct educational institution itself. The year likewise, became a kick off point for a more established secondary normal school program, which eventually became a two-year collegiate training program and still later in 1952 a four year normal college course.