The Guide
Mon, 13 July 2026

Cities / Bangkok / Lertlah School Bangkok (Lertlah)

Lertlah School Bangkok (Lertlah)

Established with over 20 years of experience, Lertlah operates multiple campuses including locations at Campus 1, Campus 2, and Campus 3. Recent teacher discussions reveal the school partners with a Canadian curriculum provider, though specific details about academic programs, year groups served, or qualifications offered remain unclear.

Lertlah School Bangkok (Lertlah) campus
Lertlah School Bangkok (Lertlah), Bangkok. Photograph · School

Curriculum
International
Ages
3 to 15
Pupils
Est. 3,500
Founded
1994

Lertlah School has operated in Bangkok since 1994 and now teaches around 3,500 pupils aged 3–15. It is a private Thai school registered with the Office of the Basic Education Commission and assessed by ONESQA, and its English Programme sits in the bilingual category rather than full international schooling.

Opinion on the school is sharply polarised. Parents on the positive side describe a clean, nurturing environment with a family feel, attentive teachers and close communication about each child's progress. Several credit the English Programme with producing confident English speakers in homes that mainly speak Thai.

The criticism is specific. Critics say the marketing of its international and English programmes is misleading, and one teacher said the accreditations behind them are "weak or nonexistent" and that pupils are pressured to deliver results that raise the school's profile. Foreign teachers cycle through quickly, a recurring staff complaint tied to low pay, short contracts and disputes over mandated teaching methods. Fees divide families the same way, with some seeing clear value and others calling them high for the standard delivered.



  • Reviews are polarised, with strong defenders sitting alongside sharp critics; the school sits in the bilingual English Program category, not full international.
  • Parents on the positive side describe a small, clean, nurturing environment, attentive teachers and close communication about each child's progress.
  • Several parents credit the English Program with producing confident English speakers in homes that mainly speak Thai.
  • Critics call out the marketing of "International/English Programs" as misleading, with one teacher saying accreditations are "weak or nonexistent" and that pupils are pressured to deliver results that boost the institution's profile.
  • Recurring staff complaint: foreign teachers cycle through quickly, citing low pay, short contracts and disagreements with mandated teaching methods.
  • Pricing-versus-value comes up on both sides, with some parents calling fees high for the standard delivered.

Positives

  • Pastoral care. Small, family-feel campus with teachers who know each child.
  • English outcomes. Parents report visible gains in spoken English, even from Thai-only homes.

Considerations

  • Programme labelling. Reddit teachers warn the "international" branding overstates the curriculum and accreditation.
  • Foreign teacher turnover. High churn among foreign staff, linked to pay and curriculum disputes.
  • Value for money. Some parents see clear value, others say fees outpace what is delivered.

Leadership

Mrs. Oluwayemisi Ayoola Thomas

Mrs. Oluwayemisi Ayoola Thomas has served as Principal of AIT International School since at least 2019, when she was appointed Acting Principal, and continues in the role as per the official school website and AIT directory in 2025.

Accreditations

  • TH_OBEC 01
  • TH_ONESQA 02

248 Kanchanapisek Road , Khwaeng Khlong Bang Parn, Bangbon District, Bangkok 10150, Thailand, ,

School website