新课程理念强调预设与生成,通过预设去促生成,通过生成完成预设的目标。课堂教学是一个动态的随机生成的过程,期间表现出的许多新问题、新想法是我们无法预料的。而这些无法预料的新想法、新问题,恰好是课堂的教学契机,乃至整节课的精彩亮点。这就要求我们教师要善于把握教学动态,用心捕捉,及时搜集。有效筛选学习活动中瞬间生成的,有利于促进学生进一步学习的生动情景和鲜活的课程资源,及时调整教学思路,使课堂走向动态生成,引向深 The new curriculum concept emphasizes pre-setting and generation, pre-production to promote, through the completion of the goal of the completion of the preset. Classroom teaching is a dynamic and randomly generated process, during which many new problems and new ideas are unforeseen. These unexpected new ideas, new problems, happens to be the classroom teaching opportunities, and even the highlights of the whole class. This requires that we teachers should be good at grasping the dynamic teaching, intentions capture, timely collection. Effective screening activities in the learning activities generated in an instant, is conducive to promoting students to learn the vivid scenes and fresh curriculum resources, timely adjustment of teaching ideas, the classroom to dynamically generated, leading to the deep