教师按照教材要求 ,在中学物理、化学、生物和小学自然课堂教学中所做的实验 ,以及其它学科如地理、小学数学要求在课堂展示或演示实物、模型、标本、挂图的教学 ,称为教师演示实验教学 ,与电化教学比较有其显著特点。其一 ,教师演示实验是学科教材中的重要教学内容 ,在教学课? In accordance with the teaching materials, teachers are required to perform experiments in middle school physics, chemistry, biology, and primary natural classroom teaching, as well as teaching of other disciplines such as geography and primary school mathematics in classroom display or demonstration of physical objects, models, specimens, and flip charts. Demonstration of experimental teaching, compared with the electrification teaching has its distinctive features. First, the teacher demonstration experiment is an important teaching content in subject textbooks.