The PEDRO GUEVARA MEMORIAL HIGH SCHOOL, formerly LAGUNA HIGH SCHOOL, was established by  virtue of the law on March 7, 1902 of the insular government with  Mr. Willy, an American, as its first Principal. The cornerstone of the  present high school was laid  in  January, 1914 on  what  was  formerly a  cemetery,  its first  building which  now houses the main  building was finally completed in 1924.  Its first filipino principal was Mr. Aquilino Carino and the first filipino teachers were Mr. Alejandro Adea, Mrs. Eustaquia delos Reyes and Mr. Antonio Maceda. This school sent forth its first graduates in 1917 with Doctor Vicente Torrechante and Mrs. Felicidad Fabiero Llamas as Valedictorian and Salutatorian, respectively. When World War II broke out in 1941, the Japanese occupation forces used the high school building as a barracks. This resulted in the total destruction of all the equipment and partial damage to the edifice itself. After the war, the provincial government with the assistance of the P.T.A rehabilitated the school. This marked the start of the consistent growth of the school. During  the school year 1954 -1955, an Act of Congress known  as  RA No. 238  sponsored by  Congressman  Wenceslao Rancap Lagumbay, one of  its  outstanding  Alumni, changed the name of  LAGUNA HIGH SCHOOL to PEDRO GUEVARA MEMORIAL  HIGH SCHOOL  in honor of DON PEDRO GUEVARA, an illustrious son of  Santa Cruz and former  resident commissioner to the  U.S.  In 1989 the school was nationalized.  At present it has a complete set of administrative and support staff doing all the office works and catering the needs of a little less than 200 teachers. Being a Division Leader School (DLS), seminars in the Division of Laguna and Region IV are frequently held here. As a member of the Network of 110 Science and Technology High Schools in the Philippines - DOST -SEI -ESEP, the school is continuously offering Special Science Classes to talented students in Science and Mathematics. The PEDRO GUEVARA MEMORIAL NATIONAL HIGH SCHOOL has sent forth into the world thousands of useful citizens and trained leaders now engaged in the task of developing their communities, earning a name for themselves, perpetuating the way of life their mentors trained them in.  Under the able administration of the present principal, it holds the promise of a brighter future.

To nurture the best in our student for god, country, and fellowmen.