It is one of the oldest schools in Nueva Ecija history since 1902, there have been many changes in the school. The municipal and provincial schools were then combined. In 1903, the big increase in enrollment necessitated the expansion of the school. Another expansion in 1904 was undertaken through a loan of 15,000.00 pesos from the Insular government and by the donation of the north of the present site by Crispulo Sideco known as Kapitang Pulong, of San Isidro, Nueva Ecija. In 1907, Eufemio Policarpio sold to the school at a nominal price, one hectare of land connected with that piece of land. Policarpio was later elected President (1917-1922) of the town. The school expansion program was started in the later part of 1904 and was completed on October 7, 1905 at the cost of 19,000.00 pesos and was opened on the same month. Through Governor Epifanio de los Santos and Municipal President Florencio Miranda, the school was named โWright Instituteโ in honor of Governor General Luke Edward Wright. During the American regime, many reforms were introduced, including social, economic, and political innovations. It was then that the Wright Institute was established in San Isidro, the first public high school outside of Manila. This institute became the Nueva Ecija High School until its transfer to Cabanatuan in 1927. The building was for a time the municipal hall. The elementary classes were held at the old provincial capitol. An agreement was reached between the school officials and the municipal authorities for the exchange of buildings.
