San Isidro Catholic School San Isidro Catholic School was born with its humble beginnings: the first group of about 20 boys and girls aged four to eight attended their first class in the old social hall building, a structure that looks like a gym. With Religion as the major subject, the school did not charge tuition. Mrs. Ma. Luisa C. Sevilla offered her services as Principal of the school while Miss Edelisa L. Daco as the only teacher