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一、课前准备,是实验的前提实验教学的成败与实验材料的关系十分密切,因此做好每节课前各项准备工作尤为重要。尤其是实验材料的选择和准备,因为现行教材中的实验许多材料实验室是没有的,这就要靠教师根据所上内容的需要进行配置。如教学“物体在水中是沉还是浮”时我们就要准备各种质地、大小和形状不同的材料(石块、木块、小铁钉、橡皮、泡沫塑料……)供学生实验用。没有做好这些准备,那么实验教学就成了一句空话。
First, pre-preparation, is the prerequisite for experimental teaching The success or failure of experimental teaching and experimental materials are very close, so every pre-lesson preparatory work is particularly important. In particular, the selection and preparation of experimental materials, because many of the materials in the existing teaching materials laboratory is not, it depends on the teacher according to the needs of the content to be configured. For example, we should prepare various materials of different texture, size and shape (stones, blocks, nails, eraser, foam ...) for teaching purposes such as teaching “when objects are sinking or floating in water” . Did not do these preparations, then the experimental teaching has become an empty talk.