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我在教“圆锥的侧面展开图”一节课的时候使用了创新教学法,收到了良好的效果。首先应用直观教学法,自制一个硬纸板的圆锥模型,让学生猜想圆锥侧面积怎样计算,然后把模型从接缝处展开,学生发现“圆锥的侧面展开图是扇形”。通过形象思维,师生研究总结知识要点:圆锥的底面周长是扇形的弧长,母线长是
I used the innovative teaching method when I was teaching the “side view of the cone” lesson and received good results. First of all, using intuitive teaching method, a self-made cardboard cone model, let students guess how to calculate the area of the cone side, and then expand the model from the seams, students found “side expansion of the cone is a fan”. Through image thinking, teachers and students study summed up the knowledge points: the circumference of the bottom of the cone is the fan-shaped arc length, the bus length is