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随着课堂改革的深化,教师的教学观念和教学方法也日益更新,比如将一些教师演示实验改为学生演示实验,或随堂实验。这当然有很大的好处,最起码提高了学生的积极性,但是有些实验存在着危险性,(特别对于初学者),则要求教师先进行规范的操作(演示),学生再进行模仿。如何把演示实验与学生自主学习相结合更好培养学生能力呢?我在这方面进行了些探究。下面以讲授氢气的性质为例。教学内容有氢气的物理性质、化学性质,氢气的化学性质又分为可燃性、还原性。一共需两课时。以下是我原来的教法和改进后的教法的教学思路对照。
With the deepening of classroom reform, teachers’ teaching concepts and teaching methods are also being updated with each passing day. For example, some teachers’ demonstration experiments are changed to students’ demonstration experiments or experimental experiments. This of course has great benefits, at least improve the enthusiasm of students, but some experiments are dangerous, (especially for beginners), require teachers to conduct standardized operation (demo), the students to imitate. How to combine the demonstration experiment with the students ’autonomous learning to better cultivate the students’ abilities? I have done some research in this aspect. Take the nature of teaching hydrogen for example. Teaching content of the physical properties of hydrogen, the chemical nature of the chemical properties of hydrogen is divided into flammability, reducing. A total of two hours required. The following is a comparison between my original teaching method and the improved teaching method.