制作模象和使用模象直观,对提高直观教学效果具有重要作用,课堂上展示几张新奇鲜艳的画面或生动感人的活动画片,加以饶有情趣的情境启发,往往使学生如闻其声,如临其境,兴致盎然,形成紧张、活泼、愉快的学习气氛。例如,初中课文中,连通器应用实例一锅炉水位计。其图象简略,未见过锅炉的学生不易联想其重要功用。如用图1,先呈现画面富立体感的锅炉整体外形,再移开部分外壳,揭露炉内水体,最后,用活动画片演示液面同升降,使学生对连通器在 Making models and using models is intuitive, which plays an important role in improving the effect of intuitive teaching. In classrooms, several novel and vivid pictures or lively moving cartoons are displayed in the classroom. Inspiring contextual inspiration often leads students to hear their voices. If you are in the environment, you are full of interest and you have a tense, lively and pleasant learning atmosphere. For example, in the junior middle school text, a connected boiler application example is a boiler water level gauge. The image is simple, and students who have not seen the boiler are not easy to think of its important function. As shown in Fig. 1, the overall shape of the boiler with a three-dimensional view of the screen is presented first. Then a part of the housing is removed to expose the body of water in the furnace. Finally, the living face is used to demonstrate that the liquid level rises and falls to enable the students to communicate with each other.