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[cheerful upbeat music] ♪ HELLO, FRIENDS, AND WELCOME TO CLASSROOM CONNECTION. I'M MR. R., AND I AM SO GLAD YOU'RE HERE WITH US. THIS IS A SPECIAL PLACE WHERE TEACHERS AND STUDENTS GET TO TALK ABOUT ...

In each video, the teacher appears in his signature grey hoodie and glasses Meet Chang Hsu, the Taiwanese math teacher who has revolutionised online education with an unorthodox approach. In a bold ...