立足学情是上好一堂课的前提和关键,也是发展学生思维能力的重要保证。数学教学离不开学生的思维参与,数学思维作为学生在数学学习与问题解决过程中不可缺少的思维形式,是利用数学语言和符号为思维的载体对数学事物进行认识与发现的心理过程。从学生的学习起点出发,遵循学生的认知发展规律,整体把握教 Based on the situation is a good lesson on the premise and the key, but also an important guarantee for the development of student thinking ability. Mathematical teaching is inseparable from the students’ thinking. Mathematical thinking, as an indispensable form of thinking in the process of mathematics learning and problem solving, is a psychological process of recognizing and discovering mathematical things by using mathematical language and symbols as carriers of thinking. Starting from the student’s learning, follow the law of cognitive development of students, the overall grasp of education