新课程标准指出,教师在课堂教学中,应积极打造活力课堂,激发学生的学习兴趣,调动学生的学习积极性,提高教学效率。初中科学是一门以实验为基础的学科。课堂教学中教师演示实验和学生分组实验,在时间、空间及仪器和药品选择上都十分有限,学生的个性不能充分展示和张扬,而把演示实验和学生分组实验转变为一个个小实验则给学生提供了一个更为广阔的空间,让学生有充裕时间进行自主探究,培养他们的探究和创新意识,从而提高课堂实验效果。 The new curriculum standards that teachers in classroom teaching, should actively create a dynamic classroom, to stimulate student interest in learning, arouse students’ enthusiasm for learning and improve teaching efficiency. Junior high school science is an experiment-based discipline. Teachers ’demonstration experiments and student group experiments in classroom teaching are very limited in terms of time, space, equipment and medicine choices, and students’ individualities can not be fully displayed and publicized. However, the demonstration experiments and student group experiments are transformed into small experiments Students provide a broader space for students to have plenty of time to conduct their own research, to develop their awareness of inquiry and innovation, thereby enhancing the effectiveness of classroom experiments.