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在初一年级期末复习的一次讲评试卷中,有一道填空题,它引领我们积极互动、共同探索,师生在不断的互动与探索中发现问题、提出问题、分析问题、解决问题,从而形成了一堂值得商榷的生成课.一、教学回放图1原题:已知如图1中∠A=60°,∠B=30°,∠C=30°则∠BDC=.(当教师写出答案时)生1:我算出答案为240°,但我觉得不对,我就改成了120°.师:你是怎么算出来的?生1:因为四边形的内角和为360°,
In a review paper written by the end of the first grade, there is a blanket, which leads us to actively interact and explore together. Teachers and students find out problems, ask questions, analyze problems and solve problems through continuous interaction and exploration, so as to form a A questionable production class. First, the teaching playback Figure 1 The original question: As shown in Figure 1 ∠A = 60 °, ∠B = 30 °, ∠C = 30 ° ∠BDC =. (When the teacher wrote the answer ) 1: I figured out the answer was 240 °, but I think it was wrong, I changed to 120 °. Teacher: How did you calculate it? Health 1: Because the interior angle of the quadrilateral is 360 °,