Simon is the best teacher in my mind. His teaching has the traditional spirit of China: he is rigorous, he is dedicated (really, I think Mr. China puts more energy into his study), and he guides a class to unite and make progress, respecting teachers and attaching importance to teaching. At the same time, he has the soul of western education: innovation and inquiry. The acquisition of knowledge is not what we eat, but what we strive for. Besides, he opened the door and the window. The sunshine outside the window is another possibility.
Chinese and western education have their own advantages and disadvantages. Only by combining the dross with the essence is the best.
Actually, I'm not very good at thinking about some subtle reasons. I only know what I've been through. Perhaps, all I know is the most superficial and direct reason. So the answer is not as profound as other respondents, but I also hope to show you the world I have seen.