Mainly the teaching method that has…
Mainly the teaching method that has three parts, the preview part for the self study for a quick overview of the face to face session, that helped me to understand more the class and be fully involved. Also after the class I had the review section that summarized the class and sometimes with small real videos made by the school. So this method worked well for me as I mastered the HSK1 mainly the the tones that were a big problem for me. So I will recommend this to anyone who is looking for an efficient way to learn Chinese.