International School Manila

The oldest international school in the Philippines, founded in 1920, the first IB Diploma school in Asia, and the marquee American-pattern option in Manila with around 2,400 students on a 7-hectare BGC campus.

ISM runs an American PK-12 programme with the IB Diploma in Grades 11 and 12, accredited by WASC. Sixty-plus nationalities, deep alumni network, and a campus built for scale with full athletics, arts, and STEM facilities. The standard reference point against which BGC families measure every other school.

Parents consistently praise teaching quality and professional handling of disruptions, including the COVID years. Fees are at the top of the Manila market, with annual tuition running PHP 830,000 to PHP 1.68 million. Diplomatic and corporate expat families dominate the parent body. Considerations are the price tag and the size, which can feel less personal than Brent, GESM, or Reedley. Default choice for senior corporate and diplomatic postings, less obvious if you want a smaller-school feel or a non-American framework.

• ISM is the oldest international school in the Philippines, founded 1920 and now sitting on a 7-hectare BGC campus with around 2,200 students from 50 plus nationalities. American-style curriculum with AP and IB Diploma options.
• Reddit treats ISM as the default top choice in Manila. One commenter said "there is none better than ISM (Manila)" and ex-students writing in r/shanghai and r/Internationalteachers describe better facilities, sports infrastructure and Ivy League acceptances than peer schools across Asia.
• Glassdoor's teacher pool is high, sitting at 4.3 across 36 reviews with 96 per cent recommending the school. Strengths cited are work-life balance, culture and career opportunities; concerns cluster around leadership and reports of administrative racism toward Filipino staff and capped progression for local hires.
• Tuition is the loudest parent complaint. Upper-school fees sit around USD 26,000 to 29,000 plus capital donations; one Reddit parent said the school is "close to 600K per year, plus 'donations' pa" and another framed USD 120,000 a year as not enough for a family with kids at ISM.
• A smaller but real strand flags student welfare. One ex-student said "a lot of students seemed to have mental health issues, and no place to seek help" and described an academically very competitive culture.
• ISM also runs a paid teacher-internship programme that several international-teacher posts treat as undermining a fully credentialed faculty model.
• The pattern: ISM is the strongest academic and facilities option in Manila, with real concerns about cost, internal staffing equity for Filipinos and historical mental-health support.