An American missionary couple arrived at the Philippines during the 1960s and settled in Aparri, Cagayan. Mr. Charles and Mrs. Roberta Selby dreamed of expanding the mission field God has given them, so Isabela became their next target. They contacted Mr. Felipe Bayani, who later became the resident minister at Bunnay Church of Christ in Angadanan, to look for an ideal place for a secondary school. He met with the late municipal mayor Eugenio S. Guillermo and told him about the plan. He was instructed to consider Peredo EDCOR, a barangay of Angadanan, and a project of the late President Ramon Magsaysay for the veterans of the World War II. This Peredo EDCOR became a town in 1967 and was named after Mayor Guillermo.
The help of the barangay leaders and the Detachment Command was sought because the place was controlled by the military. The application for a school site was approved so construction materials were at once in the area. The first constructed part is the middle portion of the building. When Mr. Selby visited the ongoing construction, he visualized that the school can start accepting students for SY 1967-68.
There were more than 80 first year students who enrolled with four teachers. The Department of Education issued a permit to operate and on July 1, 1968, the government officially recognized the school. In 1971, the first commencement ceremonies were held.
The following years, however, became alarming because of the insurgency in the locality. There were drop-outs and so it seemed that the school year will not be finished. Every morning, before the start of the classes in their devotion time, teary eyes are a usual sight. Everybody is crying as they are praying to the Lord, asking for peace and order in the community. But with all those trials, the Lord has been good.
However, during the late 1990s, the enrolment of the school continued to decrease because of the establishment of a public secondary school in town. For five years, this condition became evident, as some were even saying that the school will close soon.
In SY 2000-2001, the national government through the Department of Education set new guidelines and programs for private schools. The Educational Service Contracting met the needs of the parents. Yearly, the government increased the subsidy for the school, and word of mouth proves to be the most effective way to advertise. Enrolment started to rise again.
In September 3, 2003, the school was incorporated. Mr. Lloyd Selby, the son of the founders of the school, and his family decided to go back to the US. Mr. Honorio Sanchez, Sr., a graduate of the school, was chosen then to chair the Board of Trustees.
