教师在教学的各个阶段设置“悬念”,创设“问题情境”,可以激发学生的求知欲,达到调动学生学习兴趣的目的。一、在导入阶段设置悬念如:在讲三角形的外接圆时,教师可以先利用一些硬纸板做成残缺圆,在课前发放给学生,要求学生进行补圆比赛,看谁能够最快想出办法把它补成一个完整 Teachers set up “suspense” at all stages of teaching and create “problem situations” that can stimulate students’ desire for knowledge and achieve the purpose of mobilizing students’ interest in learning. First, set suspense in the import phase. For example, when talking about the circumcircle of a triangle, the teacher can use some cardboard to make a broken circle, distribute it to the students before class, and ask the students to make a round-up match to see who can think of the fastest. Method to make it a complete