The school was established in a house
rented from
Don Jose "Pepe" R. Ledesma in 1932 with pioneer
Siervas de San Jose, sisters Mother Amancia Bautista Milagros Sarmiento, Anunciation Marco, and Olivio Moreno. It initially provided for the educational needs of
kindergarten and primary pupils. The school adopted the original name of the
parochial school in the city, calling itself
Colegio de Sta. Teresita. During the feast of the
Immaculate Concepcion in 1949, the cornerstone of the new school building was laid in its present location at
Rizal Street. Upon completion of the new building, operations commenced transfer to the new location on October 3, 1950. The school then offered services for pre-school, primary and secondary pupils. The secondary, or high school department initially catered exclusively to female students. This was changed in 1984 when the school began accepting male students into that department, effectively becoming a
co-educational institution under the guidance of Sister Anita Bago, SSJ. The pioneer batch of
Theresianos graduated in 1988. ==Patron saint==