In 1938, AdZU opened night classes in commerce and pre-law, thus pioneering its expansion to college, later interrupted by World War II. Pre-war Ateneo expanded with an enrollment of 230 in the grade school and 376 in the high school under Eusebio G. Salvador. A Zamboangueño and a product of Escuela Catolica, Salvador was the first Filipino director of AdZU. In 1938 a library was built on the first floor of the Knights of Columbus building. A façade, an auditorium, and an annex were also built. John Shinn was appointed headmaster of the grade school and Francis X. Clark became the principal and dean of discipline of the high school.