中学化学教学大纲(修订草案)中,对于化学实验给予了较大的重视和注意。除了教师所进行的演示实验已经明确的规定外,把学生实验部分又分为两种形式进行:一种是实验作业,这是跟教师讲解教材相结合的实验;一种是实习作业,这是在学完一个题目或部分教材以后,在教师指导下,由学生单独或分组进行实验。大纲说明中指出“……实验作业能够使学生更充分地了解教材内容,帮助他们获得实际的技能和技巧……,实验作业……,特别在低年级里进行的次数应该多一些,实习作业的次数应该随着年级的升高而增加……”。这是十分恰当的指示,现在把我在教学中的一些体会写出来。希同志们指正,以便能更好地改进教学。初二学生进入初三时,虽然对于学习化学有着莫大的兴趣,但是他们对于仪器,设备和实验操作是生疏的,在这种情况下,如果在教师的示范讲解之后学生立即进行实验,那么学生的困难就将减少。譬如,在处理初三年级第一章第四节“物质的提纯法”的教材时,我曾采用过二种教法:第一种,用一节课作课堂教学(演示与讲述法相结合);另一节课进行“粗盐的提纯”与“制取蒸馏水”二项实习作业。第二种教 High school chemistry syllabus (revised draft), for chemical experiments to give greater attention and attention. In addition to the demonstration experiments conducted by teachers have been clearly defined, the experimental part of the students are divided into two forms: one is the experimental homework, which is a combination of experiments with teachers to explain the teaching materials; one is the internship practice, which is After completing a subject or part of the textbook, the experiment is conducted by the student, either individually or in groups, with the instructor. The outline notes state that “... experimental work will give students a fuller understanding of the content of teaching materials, to help them gain practical skills and skills ... and experimental work ... and more particularly in lower grades, The number of times should increase with grade ... ”. This is a very apt instruction, and I now write down some of my experiences in teaching. Greek comrades correct me so that we can better improve our teaching. Although the first two days of the first two days of junior high school have a great interest in learning chemistry, they are unfamiliar with the instruments, equipment, and experimental operations. In this case, if the students conduct experiments immediately after the demonstration of the teachers, the students The difficulty will be reduced. For example, I used two kinds of teaching methods when I dealt with the textbook of the “Material Purification Law” of the fourth chapter of the first grade in the third grade. The first one used one lesson for classroom teaching (a combination of demonstration and narration) ; Another class for “crude salt purification” and “making distilled water” two internship operations. The second kind of teaching