在探究教学的过程中,通过实验获得有效数据用来验证对问题的猜想,是探究教学得以顺利进行的重要前提.然而,有时师生开展的科学探究可能会遇到教师在课前设计中没有预料到的情况,从而使实际教学流程偏离设计的轨道.笔者近期参加了一次教研会,会中两位教师均以“自由落体运动”为 In the process of inquiry teaching, obtaining valid data through experiments to verify the conjecture of the question is an important premise for inquiry teaching to proceed smoothly. However, sometimes the scientific inquiry conducted by teachers and students may encounter that teachers do not have pre-class design. The expected situation, thus making the actual teaching process deviate from the design track. The author recently participated in a teaching and research meeting, the two teachers in the meeting to “free-fall sports” for