The opening of the Bangar Municipal High School in 1972 was through the initiative of former Mayor Avelino Pascua. It started with two classrooms for first and second year levels, at the old Gabaldon Campus. The school was later renamed as Doña Francisca Lacsamana de Ortega Memorial National High School. Later the CaSaCristo Annex was added on 1983. In 1994, the school became the Mother Institution of Regional Science High School for Region 1, after it has been recognized by then Department of Education, Culture and Sports as one of the "Most Effective Secondary Schools in the Philippines".