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在生物教学中适当地采用电教手段,实践证明,这样做有利于提高教学效率。一、加强基础知识的教学,提高课堂教学效率利用幻灯配合生物教学,要根据生物教材内容,从教学实际需要出发,讲究实效。生物课中的一些器官的生理活动基础知识,都是教材中的重点和难点。如根的吸收作用,茎的输导作用,叶的光合作用,花的双受精作甩等,用传统的讲解和挂图等教具只能看到结果,看不到它的生理活动的过程,学生较难理解,不能形成完整的概念,而采用
The use of audio-visual teaching methods is appropriate in biology teaching. Practice has proved that doing so is conducive to improving teaching efficiency. First, to strengthen the teaching of basic knowledge, improve classroom teaching efficiency Using slides with biological teaching, according to the contents of biological teaching materials, starting from the actual needs of teaching, pay attention to actual results. The basic knowledge of the physiological activities of some organs in the biology class is the key and difficult point in the textbook. For example, the absorption of roots, the transmission of stems, the photosynthesis of leaves, the rejection of double fertilization of flowers, etc., can only be seen with the teaching aids such as traditional explanations and wall charts. The students cannot see the course of their physiological activities. It is difficult to understand and cannot form a complete concept.