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几年来在化学教学中从检查学生的知识质量,得到了这样一些启示:学生所掌握的课本知识确实不算少,但灵活地运用这些知识,有机地把它们串联起来却感到相当困难。就高中的学生来说,在鉴别物质的技巧上有不少困难。当你把一组性质近似的物质交给他们去鉴别,有些学生往往不知从何下手,独立考虑问题的能力差,在实验中独立工作能力的培养也不够。通过这些问题使我检查到过去的教学在某些问题上是存在着严重的片面性,对化学教学大纲中所提出的实验作业与实习作业课的重大意义认识不足。我们在上学期开学初再次学习了中学化学教学大纲的说明,重点讨论了实验作业与实习作业的问题。分析到学生在化学知识上存在的这些问题和教师没有很好地上好实验习题课是有关系的。对化学教学大纲中所提出的“实习作业对于使学生巩固所学到的化学上的重要事实和理论,…使他们获得使用物质、鉴别物质的技巧,都是有重大的意义的。”这一句话有了新的理解和体会,并决定从这一方面着手来改进自己的教学。当高二讲完了“氮和磷”这一章后,我利用了两节课的时间,有准备的上了一堂具有复习性的实验习题课。本课的目的是“巩固、复习旧课,启发学生独立思考,养成学生在实验方面有熟练的技能和技巧。”在课程内容上是取材于该章习题的第3,7,12,14,16,五条,并根据学生具体情况作了适当的修改和补充,其内容有:
In the past few years, the quality of knowledge in examining students in chemistry teaching has been inspired by the fact that students have no shortage of knowledge of textbooks. However, using these knowledge flexibly, it is rather difficult to organically combine them in series. For high school students, there are many difficulties in identifying the skills of matter. When you give them a group of similar substances to identify, some students often do not know where to start, the ability to think independently of the problem, the ability to work independently in the experiment is not enough. Through these questions, I checked that there was serious one-sidedness in some aspects of teaching in the past, and I did not know enough about the great significance of the experimental and internship courses proposed in the chemistry syllabus. In the beginning of the semester, we again learned about the syllabus for high school chemistry, focusing on the experimental and internship problems. It is analyzed that these problems of students ’chemistry knowledge are related to teachers’ lack of good experimental exercises. “It is of great significance” that the internship assignments in the chemistry syllabus make it possible for the students to consolidate the major chemical facts and theories they have learned ... to gain access to the use of materials and the identification of their material skills. “ Having a new understanding and understanding of the words, and decided to start from this regard to improve their teaching. When Sophia finished the chapter ”Nitrogen and Phosphorus,“ I took two classes of time and prepared myself for a review lab experiment. The purpose of this lesson is to ”consolidate and review the old class, inspire students to think independently, and develop students’ skill and skills in experimenting." The content of the course is based on the first 3,7,12,14 , 16, 5, and according to the specific circumstances of students made the appropriate changes and additions, its contents are: