中学生物实验教学有两种模式:一是学生按部就班做的传统实验,另一种是学生设计实验。本文拟就学生设计实验这种模式作初步探讨。　　一、传统实验与学生设计实验的比较现行初中生物教学大纲中有学生设计实验两项,“根的向地性实验”和“观察某一动物的某种行为”实验。即将启用 There are two modes of biological experiment teaching in middle schools: one is the traditional experiment that students do on a step-by-step basis, and the other is a student design experiment. This article intends to make a preliminary exploration of this model of student designing experiments. First, the comparison between traditional experiments and student design experiments The current junior high school biology syllabus has two experiments for students designing, “rooted local experiments” and “observing certain animal behaviors” experiments. To be started soon