Sampaguita National High School (SNHS) began as a barangay high school and was approved in the year 1979, with the help of the residents of barangay Sampaguita. It has since maintained the prescribed standard of instruction in accordance with the rules and regulations pertaining to the administration and supervision of the public educational system of the country.
It was the great desire of the people of barangay Sampaguita headed by the former Barangay Captain Cerilo Acero, late Sanguniang Bayan Hon. Lucio Umpad, Sampaguita Elementary School Teacher in-charge Mrs. Felipa T. Marron, Parent-Teacher Association President Pedro Polizon, Barangay Councilmen and civic-minded individuals whose dreams and vision is to open the barangay high school, in order to help the parents in reducing the cost of sending their children to school and uplift the quality of life of the community, to enable the unemployed elementary school graduates get higher education and to lift the students' spirits and assist them in learning the necessary knowledge and skills for a better future.
Sampaguita Barangay High School's first year class was launched in June 1978 as an extension of Veruela Community High School, with Mrs. Euframia Amolong serving as the first instructor. Classes were held in a private house in front of Sampaguita Elementary School.
In accordance with R.A. 2706 as amended by the Commonwealth Act, Sampaguita Barangay High School was formally approved by the Regional Director Pedro Trinidad of Region X on January 29, 1979.
First-year and second-year classes were set up for the academic year 1979–1980. The second-year class, which held at the Catholic chapel, was managed by Mrs. Segundina R. Obtenario, who was hired for the job. After several months, a temporary PTA building built of light, wooden materials was constructed, and classes were moved there.
With a total enrollment of 238 students, first through fourth year classes were completed during the academic year 1980–1984. These students come from barangay Sampaguita, as well as its remote surrounding barangays and those that are located on the borders of Davao del Norte and Agusan del Sur.
The school was a self-supporting institution, and the wages of the teachers at the time, as well as other operating costs, were taken from students' monthly tuition fees, PTA contributions, proceeds from fund-raising events, and donations from concerned residents of Veruela.