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Ruamrudee International School (RIS)

International School in Bangkok

Verified

Quick answer

Ruamrudee International School (RIS), founded 1957 in Minburi, Bangkok, serves 1,146 students from 23 nationalities aged 3 to 18. The school delivers an American curriculum integrated with the IB Diploma Programme at upper school within a Catholic-heritage framework (motto Ad Astra — 'to the stars'). Accredited by WASC, CIS and IBO. Long-established premier choice for diplomatic and corporate expat families in Bangkok.

Key facts

  • Curriculum: American leaving qualifications include IB Diploma and AP and TOEFL and PSAT.
  • Tuition: $12,000–$22,000/yr published in THB, US$ equivalent.
  • Avg class size: 10 (max 12) Bangkok international school · 1,146 students total.
  • 23 nationalities top: Thai.
  • Ages: 3-18 school day starts at 7:10am.
  • Accreditations: WASC, CIS, IBO listed accreditations.
AmericanAges 3-18English$12,000–$22,000/yr(548400 ฿-1442000 ฿)
Est. all-in: $19,200/yr(+13%, modeled)Above average in BangkokGood valueModerate admissions89% data coverage
Students

1,146

Nationalities

23 (Thai)

Class Size

10 avg / 12 max

Admissions

Rolling

Accreditations

WASC, CIS, IBO

Qualifications

IB Diploma and AP and TOEFL and PSAT

american-curriculumpremium-tier

About Ruamrudee International School (RIS)

Ruamrudee International School is a private, non-profit day school that provides an interfaith, inclusive, and academically rigorous education for students to be balanced, successful, and compassionate individuals. Established in 1957, it was the first school in Thailand to achieve WASC accreditation. Emphasis on values and character education is a hallmark of learning at RIS. Our students are encouraged to achieve their full potential while developing skills and attributes that help them become responsible global citizens and contributing members of society.

Learning & language support (SEN / EAL)

Special educational needs (SEN)Stated
English as an additional language (EAL)Stated

This school states meaningful learning-support provision — still confirm it fits your child's specific need.

Why this matters

Special-needs provision at international schools varies widely and is rarely guaranteed by the school itself — and local legal duties differ by country. Confirm what this school provides, in writing, before you commit.

  • Learning support: moderate
  • In-house specialist staff listed
  • EAL/ESL support listed

Not published

  • —Educational-psychologist availability not stated

Questions to ask the school

  1. Is an educational psychologist on staff or available by referral?
  2. Can you support a child with my child's specific need (e.g. dyslexia, ADHD, autism), and have you done so this year? Ask for concrete examples.
  3. Is there an additional fee for learning support or EAL — and how much per year?
  4. Is learning support guaranteed for the full enrolment, or can it be withdrawn later?
Annual fees and costs for Ruamrudee International School (RIS)
ItemAmount
Annual tuition (USD)$12,000–$22,000
Annual tuition (THB)548400 ฿-1442000 ฿
Fee year2025-2026
Est. all-in cost (modeled)how we calculate$19,200(+13%)
Est. first-year total (modeled)$20,700
Cost position in Bangkok59th percentile(above average)

Hidden costs & fee notes

American curriculum with AP courses. Catholic heritage. Mid-range pricing. Registration THB 100,000. Uniforms THB 5,000-8,000. Bus THB 30,000-50,000/year. ECA THB 10,000-30,000/year.

Curriculum

American

Leaving qualifications

IB Diploma and AP and TOEFL and PSAT

External examinations

MAP, PSAT, SAT, IB, AP, and TOEFL

Exam results

Our students excel in examinations. We average 100 points higher than US students on the SAT and 2 of our IB Diploma students scored a perfect score this year when there were only 160 perfect scores worldwide. Our students are consistently offered entrance into top universities around the world.

Additional languages

Japanese, Mandarin, French, Spanish, and Thai

Learning support

The Special Education Program is designed to take into account the wide diversity of individual characteristics, interests, abilities, and learning needs. It will include parents, teachers, counsellors, and care givers at every stage and in all plans that are made to meet the student's educational needs. Equality of opportunity for all students is essential and it is important that students with special needs have the opportunity to learn along side their peers. For this reason, special education needs of students will normally be met in the mainstream classroom setting.

Special needs staff

Yes. Our Special Needs Program is overseen by our Director of Student Services, one of our school psychologists.

ESL / EAL support

Yes - Our English Language Development Program recognizes that all students represent multiple levels of proficiency in the English language. RIS offers a combination of sheltered classes, study support classes, and push-in support for subject areas. Daily study support is also offered to help students keep pace with their core subjects and to provide the opportunity to review and practice the basic components of the English language.

School hours

7:10am – 2:40pm

School busYes
Lunch

Yes. We have a diverse offering of independent service providers.

Uniform requiredYes
Dietary accommodations

Yes

Recommended neighborhoods

Minburi, Ramkhamhaeng, Lat Krabang

Verified: 2026-04-27Data source: manual+scrapedConfidence: highData completeness: 89%2 named sources

At a Glance

Fee Position in Bangkok

Mid-range
Median
$4,000$12,000–$22,000$33,567

School Profile

AffordabilitySchool SizeSmall ClassesDiversitySupport
Ruamrudee International School (RIS)

Class Size

This school
10
Max class
12
City avg
17

Student Diversity

23nationalities1,146 students

Moderately diverse

Common: Thai

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Disclaimer: School profiles are source-backed decision aids, not endorsements or official rankings. Tuition figures are approximate and may not include registration fees, uniforms, transport, or exam costs. Always verify directly with the school before applying. WhereNext is not affiliated with any school listed. This is not admissions consulting, legal advice, or official school placement guidance.