2022年《第二节我们怎样学地理》第三课时教学设计 .pdf

第二节我们怎样学地理第三课时教学设计主备人：刘小敏教学目标：1、掌握比例尺的定义，了解比例尺的几种表示方法和换算。2、运用比例尺换算实际距离。3、熟悉比例尺的大小、范围及详略关系的比较，4、了解图例和注记的含义。5、结合地图和实际问题学会比例尺的换算、熟悉和使用图例和注记教学重点：1、掌握比例尺的定义和公式。2熟悉图例和注记教学难点：熟悉比例尺的大小、范围及详略关系的比较学情分析：学生小学时学习过分数、比例尺，对本节课的知识有一定的基础，但可能有遗忘或不理解，多练习，随时巩固。图例和注记的知识需要加强记忆。教学方法：讲解法、实践练习法教学课时：3 课时教学过程教学步 骤教师活动学生活动设计意图组织教学：复习提问：地图上的方向复习，回答问题对所学知识有所巩固引入新课：提出疑问当我们拿着我们画的图时，可以看出到哪里去，应该往那里走，但是走多远呢？思考引起学生探索的欲望讲授新课：利用学生所熟悉的分数来讲解比例尺，总结归纳比例尺的定义公式。反复练习加深印象。通过分数的性质引申出比例尺的大小。（分子不变时，分母越大分数越小）回忆，讨论，练习利用学生已有的数学知识，形象，有利于学生对知识的领悟。文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 ZZ8V8D9T8U7文档编码:CD1P1W1Y3L7 HZ1N8P10U7J1 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