1, the Sydney teacher's course combines natural spelling, grammar and pronunciation rules, and the explanation is clear and easy to understand, with beautiful timbre and detailed explanation. However, the content of Yang Jiacheng's courses is scattered, and there are too many learning materials, so there are no widely used courses, which is not as accurate and detailed as Sydney's vocabulary grammar pronunciation.

2. Teacher Sydney adopts multimedia, teaching games and other interactive teaching methods, adhering to the concept of "student-centered", making students active in the classroom and helping students better master English knowledge and language application, which is deeply loved by students. However, Yang Jiacheng's learning methods are systematic, not as novel and widely used as Teacher Sydney's courses.