青岛版小学科学五年级上册5课《我们的呼吸》教学反思.doc

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1、青岛版小学科学五年级上册5课我们的呼吸教学反思五上第二单元第5课我们的呼吸教学反思青岛版小学科学五年级上册5课我们的呼吸教学反思一节教学能手评选课在紧张而又愉快的氛围中结束了，反思自己的教学，感受很多。我们的呼吸这个教学内容对于五年级的学生是极具吸引力的，在本课中最重要的环节是让学生比较人体吸进和呼出气体的成分不同，从而认识人体呼吸的过程。为了突出重点、突破难点，我采用了教师引导和学生探究讨论与实验结合的教学方式。学生在亲身体验的情境中提出问题，在老师的引导下设计实验解决问题，在碰撞交流中得出正确的结论，充分到体验探究、合作的乐趣。本节课的亮点之一在于，改进了第二个实验，利用澄清的石灰水变浑浊

2、，验证呼出的气体中含有大量的二氧化碳这个实验。传统的做法是用玻璃弯管直接向石灰水吹气，此实验的缺点是很难把握吹气的量，少了现象不明显，多了浑浊后又变回澄清，达不到实验的目的。经过课前的多次尝试，改为把一杯澄清的石灰水各倒一半在吸进和呼出的气体里，观察现象。由于是对比实验，现象更加直观、明显，学生更容易得出呼出的气体中含有大量的二氧化碳的结论，也从而深切感受人体吸进和呼出气体的成分不同。亮点之二，利用课件出示一张吸入和呼出气体成分比较图，让学生在认知冲突中产生思维的碰撞，通过师生分析，得出更具有科学性的结论：呼出比吸进的含的二氧化碳多，氧气少；或吸进比呼出的氧气多，二氧化碳少。亮点之三，别出心裁

3、的利用空花生油桶，自制了简易肺活量计。在学生自测肺活量的同时，既丰富了他们的知识，也极大地激发了学生自己动手制作的兴趣。当然，本节课还有不尽人意的地方。例如环节安排上不够紧凑，生成性的教学资源没处理好等。今后还需努力，争取在课堂教学上有更大的进步。结束语！祝大家学到有用的知识，提升自己的能力，实现自己的梦想，踏踏实实干好每一件事，为美好的明天而努力！16tkr,u3hzx6z7g8354,e.zrmrt6j8ryk6za5mnbsuceqn3a0l314mzb5kax4,92yqvh7ym8gr6pphddp1t298.i98q555c.2uvc1r56cgh2c0,kc3yp6c6ial4x

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