在学习过程中,如果学生解决问题的方法、思路等出现了共性的错误,教师可以不急于纠正,先放手让学生尝试用错误的思路去解决问题,发现自己原先认识上的矛盾和错误,在学生体验到错误的基础上再引导学生自我省悟,从而构建正确的思路方法,达成学习目标.请看一道圆周角性质习题的教学案例.师:如图1,B,E,C,D是☉O上的四点,且∠BCD=100°,求∠BED等于多少度?生:∠BED=∠BCD=100°.师:为什么?生1:同弦或等弦所对的 In the learning process, if the students solve the problem of methods, ideas and other common mistakes appear, teachers can not rush to correct, let the students try to use the wrong ideas to solve the problem and find their own understanding of the contradictions and mistakes in the Students experience the error and then guide students to self-awareness, so as to build the correct way of thinking and achieve the learning goals. See a circle around the nature of the problem of teaching cases. Teacher: Figure 1, B, E, C, D is ☉ O on the four points, and ∠ BCD = 100 °, find ∠ BED equal to how many degrees? Health: ∠ BED = ∠ BCD = 100 °. Teacher: Why? Health 1: