在初中物理教材中，要求学生会用弹簧秤测力和正确使用温度计。而实验室中利用弹簧秤和温度计在做演示实验时，后面的学生总是看不清指针或液柱的位置及刻度。因此我们做了如下两个示教模型，演示效果非常明显。1自制示教弹簧秤用一块长70cm，宽10cm的五合板或厚度相近的木板， In junior high school physics textbooks, students are required to use a spring scale to measure the force and use the thermometer correctly. While the laboratory used spring scales and thermometers to do demonstration experiments, the students behind could not always see the position and scale of the pointer or liquid column. Therefore, we have done the following two teaching models, the demonstration effect is very obvious. 1 Self-made teaching spring balance with a five-ply plate with a length of 70cm and a width of 10cm or a board of similar thickness