Abstract: The primary purpose of the “double reduction” policy is to guide schools and teachers to gain efficiency in classroom teaching, and improve teaching quality through efficient and low-cost fine teaching, thus meeting the rising demand of the people for high-quality education. In terms of the factors that affect the improvement of teaching quality and hinder the effectiveness of teaching in cultivating students’ thinking, we should, with am aim to make a change, first take the knowledge structure as the starting point to help students form a complete, unobstructed and systematic thinking path; the next step is to design challenging learning tasks targeting to students’ possible cognitive obstacles so that they can actively and consciously summarize, abstract and master the knowledge system, and reconstruct the experience and strategies to solve problems; the step that follows is to let students experience a positive process of speech thinking construction in the “thinking under listening” through the teaching in time; the last is to design homework carefully so that it produces the same effect as the teaching does on the development of students’ thinking.

Key words: double reduction, teaching quality, thinking, classroom teaching, knowledge structure, challenging tasks, teaching, task