Lertlah School, Phetkasem Road

The school is guided by the motto 'Morals and Academic Excellence,' aiming to nurture both the mind and heart. It promotes a balanced education through compassion, understanding, and ongoing cooperation between teachers, parents, and students. The educational approach integrates discipline with care to ensure a joyful learning experience.

The school offers an English Program and an International Program, both of which integrate the Thai Basic Education Core Curriculum with Canadian-inspired pedagogy. The curriculum includes subjects such as Mathematics, Science, English, Social Studies, Health, Physical Education, Computer, and Arts, with instruction delivered in both Thai and English. The school utilizes the GrapeSEED English Communication Solution to develop listening, speaking, reading, and writing skills, and employs project-based and inquiry-based learning methods across all levels.

Students are prepared for further education in Thailand or abroad, with a focus on developing bilingual fluency, critical thinking, and problem-solving skills. The school emphasizes moral development alongside academic achievement, aiming to produce graduates who are confident, capable of using technology for knowledge creation, and prepared to contribute to society. Graduates are expected to possess near-native English proficiency through the use of the GrapeSEED communication solution.

The admissions process begins by contacting one of the three campuses to schedule a school visit. Prospective families must submit an application form along with previous school records, followed by an age-appropriate student assessment and a family interview. Once accepted, the process concludes with enrolment paperwork, uniform fitting, and tuition arrangements.

Lertlah School operates three campuses in Bangkok: Petkasem, Kanchanapisek, and Kaset-Nawamin. Each campus provides specialized learning environments, with the Kaset-Nawamin location noted for its focus on innovation and advanced ICT, and the Petkasem campus offering both English and International Programs. The facilities are designed to support a range of academic and developmental activities, including classrooms equipped for technology-integrated learning.