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随着现代媒体的不断出现,许多学校、教师运用现代媒体的比重逐渐加大,但却忽视了对传统媒体的研究和利用.笔者在教学中体会到,利用黑板画进行直观教学,能提高学生的注意和学习兴趣,有助于知识的掌握和巩固,可有效地提高课堂教学效率.具体表现在以下几方面:一、帮助学生准确掌握生物体的结构特点生物体的结构是学生必须掌握的基础知识,是理解生物体功能的前提.我在教学中采用先让学生看模型或挂图,然后边讲述结构的特点,边在黑板上画图的方法,把结构分层地“解剖”,把知识化整为零,一步一步引导学生掌握知识.例如:讲述线粒体结构时,先用模型或挂
With the continuous emergence of modern media, many schools and teachers have gradually increased their use of modern media, but they have neglected the study and use of traditional media. The author realizes in teaching that the use of blackboard painting for intuitive teaching can improve students. The attention and interest in learning contributes to the mastery and consolidation of knowledge, and can effectively improve the efficiency of classroom teaching. The specific performance in the following aspects: First, to help students accurately grasp the structural characteristics of the organism The structure of the organism is the student must master Basic knowledge is the premise to understand the function of organisms. In teaching, I use students to look at the model or wall chart first, and then describe the characteristics of the structure, and draw the diagram on the blackboard to “dissect” the structure in a layered manner. Divide the whole process and guide the students to master the knowledge step by step. For example: When describing mitochondrial structure, first use model or hang