化学是一门以实验为基础的学科。它通过教师演示实验或组织学生亲手实验操作,可以使学生获得生动的感性知识,从而更好地理解、巩固所学化学知识,形成化学概念,并可激发学生的学习兴趣。但教学实践表明,多数学生自己动手做实验的能力还较差,为改变这种情况,在教学中可采取如下措施。 Chemistry is an experiment-based discipline. Through teacher demonstration experiments or hands-on experiments organized by students, students can acquire vivid sensory knowledge so as to better understand and consolidate the learned chemistry, form chemical concepts and stimulate students' interest in learning. However, teaching practice shows that most students are still poor at doing experiments on their own. In order to change this situation, the following measures can be taken in teaching.