【设计思路】一、降低难度,学会科学探究影响摆的快慢的因素有许多,一般教材都把摆幅的大小、摆锤的轻重、摆线的长短这三项作为研究对象。虽然只有三个变化因素,但对四年级的小学生来说,还是有一定的难度的。要想研究其中的一个因素,必须控制好另外两个因素。于是教师在一开始 [Design ideas] First, to reduce the difficulty, learn to explore the impact of scientific research speed There are many factors that the general textbook swing size, pendulum weight, the length of these three as the research object. Although only three changes, but the fourth grade pupils, there is still a certain degree of difficulty. To study one of the factors, we must control the other two factors. So teachers at the beginning