At 8: 00 am on March 23rd, Su Dekuan, a professor in the Department of Mathematics of Zhejiang University, gave a lecture on calculus as scheduled. Under the podium, nearly 150 students sat neatly, and in the virtual classroom on the network, nearly 5,000 "students attending classes" poured in early in the morning. A tripod, a mobile phone, the mobile phone is facing the projection curtain on the speaker's desk, so Sude Mine moved its calculus course to the live webcast room in real time.

"When you like a person, you can see his little change, everyone else becomes a constant, and TA is the only variable ..." In class, Su Dekuan's "math jokes" made the students laugh and made the "audience" in the live broadcast room "like" one after another.

From February 27th to the morning of March 23rd, Sude Mine has conducted 29 live broadcasts. There are at least two classes every week, which are watched by thousands to tens of thousands of people. The most popular class has been watched by more than 20,000 people.

Su Dekuan is a famous teacher of Zhejiang University. Since teaching at Zhejiang University for 30 years, he has established his own unique classroom style with endless mathematical jokes, which is deeply loved by students and called "mine owner" by students. The course Calculus offered by Sude Mine has only 150 students, but it has set a record of 3,000 students attending classes at the same time.

"Nowadays, students love surfing the Internet, and the Internet can be a very convenient' second class'." Su Dekuan said that he began to pay attention to webcasting last year, just to see if it can be used for teaching and serving students. "The advantage of online classroom is that it benefits a lot and is not limited by the number of people. The live video can be played back repeatedly, helping students with weak foundation to learn and improve step by step, and also facilitating teachers to improve the teaching effect in a targeted manner. " Su Dekuan said.

On the internet, students who are interested in learning can have classes and exchange discussions with each other, and the "academic atmosphere" is not lost in the classroom. Due to the inability to interact with the audience in real time during the live broadcast, Sude Mine takes an hour every week to answer questions in the webcast room. "With the media, ordinary undergraduates can also enjoy the quality courses of excellent teachers." Netizen "Puffer Taiyi" said.

Prior to this, Sude Mine had set up an "online class" in Weibo to share learning experience and answer questions from netizens. "One person answers the question and everyone benefits." Sude Mine spends almost three hours every day browsing and replying to Weibo's news. Since 20 13, more than 30,000 messages have been replied and nearly 80,000 fans have been harvested.