从《一堂没有结束语的课例 :三角形的内角和》可看出 ,东江老师的教学充分体现了以学生为主体和发展学生思维能力为核心的教学目标 ,为学生创造了一个能独立思考、自由发表意见的课堂氛围 ,激发了学生的学习动机和智力参与 .但由于教师对教材研究的不够深入细致 ,导致了对几个 From the “Class without a concluding remark: the interior angle of the triangle”, it can be seen that the teaching of Dongjiang teacher fully embodies the teaching goal of taking the student as the main body and developing students’ thinking ability as the core, and creates an independent thinking and freedom for the students. The classroom atmosphere of expressing opinions motivated students’ learning motivation and intellectual participation. However, due to the in-depth and meticulous study of the teaching materials by teachers, several