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《中国地理》上册第一章“地球上的五带”一节,为了让学生了解极圈和回归线的存在及意义,需用月地运行仪(或三球仪)作演示。但由于初一学生的空间想象力差,往往演示多次,仍然对太阳直射点的移动规律,得不到明确的认识。为了提高演示效果,我做了一些改进: 以湖北省教学仪器厂制作的月地运行仪为例(如右图所示),在横杆A处的固定螺丝上,加套一根一端弯
The first chapter of “China Geography,” the first chapter of the “Five Belts on the Earth” section, in order to allow students to understand the existence and significance of the polar circle and the regression line, a monthly operation instrument (or three ball instruments) is required for demonstration. However, due to the poor spatial imagination of the first-year students, they often demonstrate many times and still have no clear understanding of the law of the direct movement of the sun. In order to improve the demonstration effect, I have made some improvements: Take the example of the monthly operation instrument made by the teaching instrument factory in Hubei Province (as shown in the right figure), and add a sleeve to one end of the fixing screw at the cross bar A.