page_title: Triam Udom Suksa School
section_title: History
hierarchical_section_title: Triam Udom Suksa School / History
caption_attribution_description: English: Building&#160;1, Triam Udom Suksa School. Built in 1935, it is the oldest building in the school. The name of Mathayom Horwang School of Chulalongkorn University, which predated Triam Udom Suksa, is still displayed on the façade. ไทย: ตึก 1 โรงเรียนเตรียมอุดมศึกษา สร้างขึ้นใน พ.ศ. 2478 เป็นอาคารที่เก่าแก่ที่สุดในโรงเรียน ป้ายโรงเรียนมัธยมหอวังแห่งจุฬาลงกรณ์มหาวิทยาลัยยังปรากฏอยู่ด้านข้างอาคารเพื่อเป็นอนุสรณ์แก่โรงเรียนมัธยมหอวังฯ ซึ่งตั้งอยู่บริเวณดังกล่าวก่อนการก่อตั้งโรงเรียนเตรียมอุดมศึกษา
context_page_description: Triam Udom Suksa School is a state school in central Bangkok, Thailand. It admits upper-secondary students and has the largest yearly enrolment in the country. Founded in 1938 as a preparatory school for Chulalongkorn University, the school has long been regarded as the best secondary school in Thailand, and attracts students from all over the country in its highly competitive entrance examinations.
context_section_description: The founding of Triam Udom Suksa School relates to the revised National Education Plan of BE 2479 (1936 CE), which imposed four and six years of primary and secondary education respectively, with an additional two years of pre-collegiate schooling required for students who were to pursue higher education. This pre-collegiate level was to be initially provided by the students' prospective universities, and accordingly the University Council of Chulalongkorn University authorised the establishment of such a school on 3 January 1938. The founding of the school, which took place over a tight time frame of three months, was overseen by Mom Luang Pin Malakul, then head of the university's teacher-preparation programme, who became the school's first director. The school took over the location of Mathayom Horwang School (of which ML Pin was also headmaster) on Phaya Thai Road in the vicinity of the university, and became known as the "University Preparatory School, Chulalongkorn University", or Rong Rian Triam Udom Suksa Haeng Chulalongkorn Maha Witthayalai (โรงเรียนเตรียมอุดมศึกษาแห่งจุฬาลงกรณมหาวิทยาลัย). The school, which was the first co-educational in the country, opened on 16 May 1938, and classes began on 19 May.
  The school rapidly grew over the first few years, admitting up to 568 students in the 1940 academic year. In December 1941, the school was occupied by Japanese forces in the course of World War II, forcing the staff and students to relocate to temporary locations around Bangkok. Classes briefly returned to the school in 1943, but had to again leave after the school was damaged by Allied bombing on 19 January 1944. Part of the staff and students were transferred to various cities around the country, where preparations had already taken place for the establishment of additional preparatory school campuses. (Changes of government policy would however later cause these campuses to close down.) The school remained occupied even at the conclusion of the war, this time by Allied forces.
  Teaching finally returned to normal in 1946 after Allied forces withdrew from the school. During that period, government policy favoured expanding pre-collegiate level teaching to public schools under the Department of General Education instead of being provided by the universities. As a result, authority over the school was transferred from Chulalongkorn University to the Department of General Education on 1 July 1947. The school's students have since been required to take university entrance examinations as regular students, and the name of the school was shortened to "Triam Udom Suksa School". The school, however, retained use of the Phra Kiao as its symbol.
  In June 1947, just prior to the transfer, a Teacher Training Department was created under the school's authority to support the expansion of the national school system. This department, which became known as the Satit (demonstration) School, would extend teaching to mathayom 1–6 levels, and authority was transferred to the College of Education (now Srinakharinwirot University) in 1955. It presently exists as Patumwan Demonstration School. As Triam Udom is considered as the best high school in the country, Pathumwan Demonstration School ranked one of the best school as a biggest feeding school to Triam Udom in recent years.
  The demand for pre-collegiate level schooling saw a sharp increase in the late 1950s, resulting in the Department of Secondary Education setting up special pre-collegiate schools within regular school campuses. Such a school was set up near Orachon Canal in the eastern portion of Triam Udom Suksa School in 1958, and became known as "Triam Orachon". Another campus, Triam Bang Pu, was established at Bang Pu Seaside Resort in Samut Prakan Province before being moved to Sam Phran District, Nakhon Pathom Province, and became known as Triam Udom Suksa Sam Phran School. Both schools were merged with Triam Udom Suksa by 1964.
  In 1960, the national curriculum was rewritten, and the educational stages were redefined with seven years' primary education and five years of se
caption: The name of Mathayom Horwang School is still displayed on the façade of Building 1.
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