TEFL Certified
Fully accredited to teach English as a foreign language, ensuring students receive internationally recognized, standards-aligned instruction.
Verified
TEDx
Recognized Speaker
Our Founder & Owner
Hi, I'm John Wongratanamajcha
With over 7 years of experience in teaching and professional development, my mission is simple: help every student build real English fluency and the skills they need to succeed — in school, in their career, and in life. Whether through structured group classes or personalized tutoring, every lesson at GSC is designed to be practical, engaging, and genuinely effective. Fluent in both English and Thai.
Flexible Learning Formats
GSC Learning Center offers both structured group classes taught by experienced instructors and personalized one-on-one tutoring sessions — so every student can learn in the format that best fits their goals, pace, and schedule, with full access to our online learning platform between sessions.
Proven Track Record
Students have advanced their careers, secured promotions, and transitioned smoothly to international universities or life abroad.
Flexible Scheduling
Classes are scheduled to fit your lifestyle, with intensive group sessions and one-on-one instruction available across a range of time slots.
Supportive Environment
A safe, judgment-free space where students thrive through peer support, in-depth discussions, and consistent encouragement.
Our Credentials
Recognized Expertise — Certified to Elevate Your Skills
TEDx Public Speaker
Degree-holding public speaking expert and TEDx Hang Dong speaker, dedicated to helping others master effective communication.
VerifiedCambridge Curriculum
Our English teaching is grounded in the Cambridge curriculum — one of the world's most trusted and globally recognized frameworks for English language learning and assessment.
Verified
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