“小孔成像”教学实录与反思

Teaching Records and Reflection of “Keyhole Imaging”

"小孔成像"是苏教版《科学》五年级上册"光与色彩"单元中《光的行进》一课中的内容。《光的行进》一课主要分为三个部分:认识光源、认识光的直线传播现象、研究小孔成像。在教学时,笔者对教材做了改进和拓展,首先让学生认识古人对于小孔成像的发现以及现在的模仿实验,激发学生对小孔成像实验的兴趣;其次制作一个小孔成像实验盒,探究小孔成像的特点;接着呈现自制暗箱,了解人类对这一现象的持续研究,认识照相机的发展史;最后解释生活中的小孔成像现象,将课堂和生活实际相联系,让学生在潜移默化中了解学习的意义,学会用科学的眼光去看待生活现象,启发学生利用所学的知识在生活中创造、创新,感受科学和生活的联系。

"Pinhole imaging"is the content of the lesson"the progress of light"in the unit of"light and color"in the fifth grade volume I of Science published by Jiangsu Education Press.The course of"the progress of light"is mainly divided into three parts:understanding the light source,understanding the straight-line propagation phenomenon of light,and studying pinhole imaging.In the teaching,the author has improved and expanded the teaching materials.First,let the students know the discovery of the ancients for keyhole imaging and the present imitation experiment,and stimulate the students’interest in keyhole imaging experiment;Secondly,a pinhole imaging experiment box is made to explore the characteristics of pinhole imaging;Then we present the self-made darkbox to understand the continuous study of this phenomenon and the history of camera development;Finally,explain the phenomenon of pinhole imaging in life,connect the classroom with the reality of life,let students understand the meaning of learning imperceptibly,learn to look at the phenomenon of life with a scientific perspective,inspire students to use the knowledge they have learnt to create and innovate in life,and feel the connection between science and life.