1　鼓励学生参与实验前的准备活动 ,激发学生学习兴趣、明确实验过程　　实验准备是实验的重要一环 ,实验准备的好坏直接关系到实验教学的成败。在实验前教师一般都需要准备实验器材及材料 ,这时就可以鼓励学生自愿参与教学活动。如进行“观察植物细胞的有丝分裂”和“观察根对 1 Encourage students to participate in pre-trial preparation activities, stimulate students’ interest in learning, and clarify the experimental process. Experimental preparation is an important part of the experiment. The preparation of the experiment is directly related to the success or failure of experimental teaching. Before the experiment, teachers generally need to prepare experimental equipment and materials. At this time, students can be encouraged to voluntarily participate in teaching activities. Such as “observing mitosis in plant cells” and "observing the root pair