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《自然》第一册第十三课“怎样测定太阳的高度”是本册教材的难点。学生对用“角度”表示太阳的高度不易理解。按课文中的制图方法来测定太阳的高度不仅麻烦,学生也不容易掌握。为此,我在教学中,自制了一种“太阳高度简易测定器”。这种教具制作简单,使用方便,学生用它能很快测出太阳的高度。现介绍如下。器材:木板制成的量角器一个(直径30厘米左右)。大头针、图钉各一枚。宽1厘米、长13厘米的马粪纸一张。制作:在马粪纸正中划一条中心线,将一端剪成箭头形状,做成一指针。
The first volume of “Nature” Volume XIII “How to determine the height of the sun” is the difficulty of teaching materials. Students use the “angle” that the height of the sun is not easy to understand. Measuring the height of the sun by drawing methods in the text is not only troublesome, it is not easy for students to master. To this end, I made a self-made “solar altitude cuvette” in teaching. This teaching aids are easy to make and easy to use, and students can quickly measure the height of the sun with it. Now introduced as follows. Equipment: a protractor made of wood (about 30 cm in diameter). Pin, pushpin each one. 1 cm wide and 13 cm long manure paper. Production: In the middle of the manure paper draw a centerline, the end cut into the shape of the arrow, made of a pointer.