He is an excellent teacher with a well prepared class each time.

I had a great class! I had a lot of time to practice talkinga and many chances to practice listening. He is a patient and kind teacher.

The teacher did a great job prepareing for the class. He created a lesson specifically for my level, needs and interests. He is so patient, helpful, and well-prepared. I really appreciate and enjoy his classes.

오성근 came well-prepared and created such a positive and encouraging atmosphere. He has a gentle and pleasant way of teaching and giving feedback. I really appreciate how he took the time to ask questions and make sure everything is fully understood. The lessons also follow a clear and thoughtful progression. I would definitely recommend taking classes with 오성근 👌👍