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初中植物学《水绵》一课,教学重点是水绵的形态结构和生殖方式,教学难点是如何理解水绵细胞立体感的建立和接合生殖的概念。教学目的是要培养学生的观察、思难能力、进化观点和生态观点。王玉红老师在执教本课时,在深入钻研教材的基础上,依照大纲要求,结合初一学生的特点,坚持了以教师为主导,学生为主
In the junior high school botany “Shuimian” lesson, the teaching focus is on the morphological structure and reproductive mode of the Spirogyra, and the difficulty in teaching is how to understand the establishment of the three-dimensional sense of the Spirogyra cells and the concept of joint reproduction. The purpose of the teaching is to cultivate the students’ observation, thinking ability, evolutionary perspective and ecological viewpoint. In the course of teaching this class, teacher Wang Yuhong studied the teaching materials in depth, according to the requirements of the outline, combined with the characteristics of the students of the first grade, insisted on the teacher-led, student-based