1.启发和发现并用,促进学生思维的积极性。我在教授义务教育教材数学“圆的知识”一课时,将数张圆形纸片展示给学生,让他们将手中圆纸片对折再打开。问:你在圆纸片上发现了什么?学生立刻集中了精力,都在圆纸片发现有折痕。而且大部分学生又发现:圆纸片上有无数条折痕。老师马上抓住时机表扬了他们观察仔细。在其气氛的影响下,学生们都争先恐后举手发言,并且总结到:圆面上所有折痕相交于一点;折痕两旁的图形完全重合。这时,老师感觉到“火候”已到,立即让学生打开课本,同时白板马上出现“交点”、“折痕”两词。学生通过老师的 1. Inspire and discover and use to promote the enthusiasm of students thinking. I teach compulsory education textbook mathematics “round knowledge ” a lesson, will be a few sheets of circular paper to show students, so that they will fold the hands of paper folded again. Q: What did you find on the round sheet of paper? Students immediately concentrated their energies and found creases in the round sheet. And most students also found that there are countless folds on the round paper. The teacher immediately grasped the opportunity and observed them carefully. Under the influence of their atmosphere, students are vying to raise their hands and conclude that all the creases in the circle meet at one point; the patterns on both sides of the crease coincide completely. At this moment, the teacher felt that “hello ” has arrived, let the student open the textbook immediately, at the same time the white board immediately appears “intersection ”, “crease ” two words. Students pass the teacher’s