Calvin grew up in Singapore in a bilingual environment, which made him fluent in English and Mandarin in his daily life. This background has given him the confidence to teach both languages for study, business, and everyday conversation. Additionally, he has extensive experience in EdTech and professional training as a trainer and coach in digital skills, product management, and business at RevoU, EBIZ Institute, and Smarter Me. He has also worked as a business consultant and product manager, mentoring startups and professionals in Indonesia and Singapore.

Fluent in English, Mandarin, Indonesian, and Malay, Calvin teaches in a practical, conversational style with a focus on real-world application. He not only teaches grammar and vocabulary but also effective communication skills for work, study, and daily life. With his bilingual fluency and international training experience, Calvin is ready to help students build relevant, engaging, and confident language skills.