The modes of teaching have been changed several times throughout history. With the booming of technology and the prevalence of the internet, people have more access to acquire information other than simply talking face-to-face. Thus, taking classes through websites or online meetings has become a trend all around the world. Especially during the Covid-19 period, people are prevented from meeting each other. Online synchronize courses came to a crucial and necessary part of education. Compared to the traditional mode of instruction, there are both strengths and drawbacks to its popularization.