Kalayaan National High School started when Mrs. Esmelita P. Ulangca, the principal of Bagong Silang High School, felt an urgent need of an annex school in order to accomodate the heavy influx of enrolment of students who were already spilling in the classroom and many were being refused due to overcrowded class size. In view of this situation, she made a request to Congresswoman Aurora "Nene" Henson for an annex school and later endorsed the request to Congressman Roberto Guanzon Jr. who worked out the feasibility of this plan to Congress.

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In 1996, the construction of two (2) three-storey buildings with 9 classrooms each were constructed in Phase 10, Bagong Silang, Caloocan City, with a total land area of 19, 121 sq. meters. When the first building was almost completed and ready for a venue of instruction, the first enrolment commenced on May 21, 1997 where the first batch of 1,450 first year enrollees were organized into 14 sections with 18 teachers from Bagong Silang High School. Mrs. Ulangca designated Mrs. Nenita Mercado, Head Teacher VI, to take charge of the school. Despite the absence of facilities, only the buildings, the school tried to offer the best to its learners.

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As classes went on, another three-storey 15-classroom building was also constructed. When the second three-storey building was on its completion and ready for use, 300 second year and 212 third year students from Bagong Silang High School and residents of Phase 10 were transferred to the new site. Along with them were eight (8) teachers. In this, Kalayaan National High School offered wider services in educating the youth. The concerted effort, support and assistance of the parents led by Mrs. Nida Soriao, the community and other sectors were the lifeblood of the new school.

 

On December 1, 1997, due to the promotion of Mrs. Mercado, Mrs. Jeusa G. Gomez, Head Teacher in Mathematics Department of Bagong Silang High School was assigned to take charge of the school. On January 22, 1998, Mrs. Adelaida C. Gagarra, who was then principal of Bagong Silang High School, made her first visit to the school.

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The first inauguration of the said buildings was held February 6, 1998 with the presence of Congressman Guanzon, the City and Division Officials, and the elementary and secondary school principals.

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In June 29, 1998, a Division Memorandum No. 97 s. 1998 was issued to inform the field that the establishment of Kalayaan National High School (formerly Bagong Silang High School, Kalayaan Annex) as per Republic Act. No. 8644 entitled "An Act Establishing a National High School in Bagong Silang, Caloocan City to be known as Kalayaan National High School".

 

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