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1、青岛版小学科学五年级下册凸透镜评课记录青岛版小学科学五年级下册凸透镜评课记录评课记录 本节课的教学充分地考虑到了学生的心理和生理特点,较好地贯彻了小学科学课程标准提出的探究教学的基本理念。教学分“提出问题”、“猜想”、“制定计划”、“进行实验与收集证据”等五个环节进行,先由学生在生活中对凸透镜的经验认识 -“放大镜”开始,“从生活走向物理”,激发学生的学习兴趣,紧接着教师追问:“通过凸透镜看到的物体都是放大的吗?”-学生回答不一,从而引发学生的认知冲突,学生的求知欲大增。然后再在教师的帮助指导下,由学生自行提出问题,经过猜想、制定计划、探究实验并分析所得数据得出成像规律,全过程学生成了自己学习
2、的主人,整堂课上得生动而活泼。 本节课的另一个显著特点就是“形散神聚”。探究教学给了学生更加宽松的思维和活动空间,如何在教学过程开放的同时尽量减少探究活动的盲目和无序呢?老师在探究教学的过程中适时地给了一些方向性的提示和指引,但这些提示和指引又区别于“实验步骤”,正相反,教师在教学过程中只起了组织、指导、帮助和促进的作用:事先将学生分成若干探究学习小组,让学生在各小组中合作学习、讨论交流,再代表自己所在小组发言、提出探究方案,最终在多个方案中自行选取一个付诸实施这一系列的教学活动既融洽了师生、生生关系,又培养了学生合作交流、学会学习的能力。另外教师在探究教学中针对一些随即出现的、甚至是始料未及
3、的问题和错误予以纠正,比如教学中学生认为光屏上模糊的像就是虚像,这在传统教学中很难在课堂上“暴露”出来,而老师对这个意料之外的问题的处理显然是这节课的一个“亮点”。特别值得一提的是老师在为配合本节课而设计并使用的学生学案方面的尝试,学案的使用无疑加强了学生探究学习的目的性,整节课几乎没有发现有学生随意玩耍实验器材、手足无措等现象。 本节课侧重于科学探究中“制定计划”环节的教学,然而教师在引导并帮助学生在提出猜想、制定计划的过程中注意考虑影响问题的主要因素,控制无关的变量等方面显得有些单薄。建议是否能将“进行实验与收集证据”移至下一课时,以便使得这部分的教学更为丰满。结束语!祝大家学到有用的知识
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