细胞分裂尤其是有丝分裂和减数分裂是生物学教学中的重点,但这部分内容学生不易掌握。为了解决这一问题,笔者对现行挂图作了改进,通过使用,教学效果良好。现将制作和使用说明如下: 一、有丝分裂1.制作(1) 制作两个半径分别为45厘米左右的圆盘,材料可用吹塑纸,其中第一个园盘上留 Cell division, especially mitosis and meiosis, are the focus of biology teaching, but this part of the content is not easy for students to grasp. In order to solve this problem, the author made improvements to the current wall chart. Through its use, the teaching effect was good. The production and use instructions are as follows: 1. Mitosis 1. Production (1) Make two discs with a radius of about 45 centimeters. The material can be blown with paper, and the first one is left on the disc.