With a handful of expatriate parishioners and local Thai students, the Redemptorist priests opened RIS in 1957 with the intention of providing a quality Western education to its learners. Six decades later, Ruamrudee has grown into a community of 1200 students pursuing academic and moral excellence within a multicultural environment. RIS offers a rigorous academic program utilizing an American enhanced curriculum, as well as a choice of the International Baccalaureate Diploma Program (IBDP) and Advanced Placement (AP) courses in high school.
Throughout RIS's seven decades serving the international community of Bangkok, the school has guided its students toward their greatest intellectual development while supporting their individual growth as compassionate and loving members of the a global community. It is this focus on character development that sits at the core of Ruamrudee International School. This is best described by the English meaning of the word Ruamrudee "Union of Hearts."