样本是学生自己创造出来的宝贵的、有价值的教学资源。教师要有敏锐的洞察能力,对每一个样本做出及时、准确地判断,捕捉到有效的样本,促进课堂动态生成。如何捕捉有效的样本呢?我觉得应该从以下3个方面入手。一、在备课中预设有效样本,引领动态生成俗话说:凡事预则立,不预则废。预设是教学的基本要求,也是教学的起点。在备课中,预设有效样本与预设其他环节同样重要。教师要给自己预设的样本确立一个明确的目标,使它们成为 The sample is a valuable and valuable teaching resource created by the students themselves. Teachers should have keen insight skills, to make timely and accurate judgment for each sample, to capture a valid sample, to promote the dynamic generation of the classroom. How to capture a valid sample? I think we should start from the following three aspects. First, prepare a valid sample in the lesson preparation, leading the dynamic generation Saying: everything preconditions legislation, do not pre-waste. The default is the basic requirement of teaching, but also the starting point of teaching. In lesson preparation, pre-setting valid samples is just as important as pre-setting other sessions. Teachers should set a clear goal for their own sample to make them become