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六年制第九册《三角形、平行四边形和梯形》教学中,要学生掌握的各种图形特点,多而复杂,学生易混淆,因此要引导学生抓住各部分的脉络,系统地掌握知识。一、三角形、平行四边形和梯形的认识这部分可用图表法和集合示意法归纳总结。1.图表法
In the sixth volume of the “Triangle, Parallelogram, and Trapezoid” teaching, the various graphic features grasped by the students are complicated and complicated. Students are apt to be confused. Therefore, students should be guided to grasp the context of each part and systematically master the knowledge. First, the triangle, parallelogram and trapezoidal understanding of this part of the chart method and set the schematic method to summarize. Chart method