Abstract: The teaching characteristics of PBL can be summarized as eight elements of "contextualization, problem, cooperation, inquiry, construction, peer evaluation, self-reflection, and learner-centered". These elements also clearly sort out the basic characteristics of the "reading circle task". The "Reading Circle Task" is precisely to create a "situation" from the text, to raise "questions" according to roles, and to "explore" the connotation and implication of the text through "cooperation". Through the flipped classroom, students become the main body of learning, and teachers play the role of guides, only providing clues and methods to solve problems, helping students to actively "construct" knowledge and carry out deep learning. The whole teaching process enables students to continuously develop critical thinking, which embodies the teaching philosophy and essence of PBL.

Key words: Reading circle, Task, PBL, Teaching, Evaluation