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【2026年北师大版新教材】小学数学二下2.1《校园一角》教学设计

  • 2026-03-27 12:15:59
【2026年北师大版新教材】小学数学二下2.1《校园一角》教学设计

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2026年春北师大版二年级数学下册第二单元第一课时

PART 01

课时教学目标
(一)核心素养目标
  1. 数学眼光
能从校园场景、生活物品里识别长方体、正方体、圆柱,感知立体图形在生活中的实际存在。
2. 数学思维
通过折纸操作,初步建立“平面纸张转化为立体图形”的思考方式,感知平面与立体的联系。
3. 数学语言
能用简单的话语描述长方体、正方体、圆柱的样子,比如“长桌像长方体,有长长的面”。
(二)教学目标
(1)认识长方体、正方体、圆柱,能说出它们对应的生活物品(如长桌对应长方体); 
(2)能跟着步骤用长方形、正方形纸折出长桌、方凳等简单立体图形; 
(3)感受立体图形和生活的联系,愿意参与折纸、观察等数学活动。

PART 02

教学重点难点
(一)教学重点
认识长方体、正方体、圆柱的基本特征,能对应生活中的相关物品。
(二)教学难点
通过折纸将平面纸张转化为立体图形,理解“平面变立体”的简单逻辑。

PART 03

教学设计思路
从“校园一角”场景导入,引导观察识别立体图形,通过动手折纸感知平面变立体,结合练习巩固,联系生活感受图形的实际应用。

PART 04

教学准备
(一)教师
“校园一角”放大图、长方体/正方体/圆柱实物、折纸示范用的纸张与成品。
(二)学生
长方形纸、正方形纸(各2张)。

PART 05

板书设计
图形大变身(二)
  1. 物品对应形状:
• 长桌→长方体
• 方凳→正方体
• 水杯→圆柱
2. 折纸小技巧: 分→折/卷→变立体

PART 06

教学资料补充
(1)古代立体容器:商代时人们用圆柱陶罐存粮食、正方体木箱装物品,这些立体图形让生活收纳更方便,是古人的“数学智慧”。 
(2)“图形猜猜猜”游戏:一人描述物品形状(如“像圆柱,能装水”),其他人猜物品,能快速熟悉立体图形特征。

PART 07

教学过程
环节1:导入(约5分钟)
咱们先看这页的“校园一角”,是不是和咱们学校的小角落很像?你看这里的长桌、方凳,还有水杯,都是咱们常碰的东西。它们长得像咱们之前听过的“立体图形”不?今天咱们不光认这些图形,还能用纸把它们折出来,特别好玩!
环节2:新授(约20分钟)
先看这些物品的形状:长桌的面是长长的、平平的,这就是长方体;方凳的面方方的、边一样长,是正方体;水杯直直的、上下一样粗,是圆柱。咱们试着用自己的话说说这些形状的样子呗?
现在拿长方形纸做长桌:跟着书上步骤,先把纸平均分成3份,然后沿着线折一折——看,平平的纸是不是慢慢变成“长桌”那样的长方体了?动手试试,不会的可以看看旁边同学的。
再做方凳和水杯:方凳用正方形纸,把每个面都折成方方的;水杯更简单,把长方形纸卷一卷,就能变成圆柱啦!
环节3:练习(约10分钟)
看“练一练”第一题:用不同形状的纸做桌子,比如正方形纸、刚才没用过的纸,折好和同桌说说“你用的什么纸,折的桌子像哪个形状”。
第二题:长方形纸还能折出啥?比如卷成更细的圆柱,或者折成其他样子,动手试试,一会咱们分享!
环节4:总结(约5分钟)
今天咱们认了三个新朋友:长方体、正方体、圆柱,还知道长桌、方凳、水杯分别对应它们。更厉害的是,咱们用平平的纸折出了立体的形状——数学是不是藏在生活里,还能动手玩起来?

PART 08

作业设计
(一)基础性作业
回家和爸爸妈妈说说,家里哪些东西像长方体、正方体或圆柱(比如冰箱、魔方、笔筒)。
(二)拓展性作业
用长方形纸折一个新的立体形状(不是今天折的),明天带来和小伙伴展示,说说你折的是什么形状。

PART 09

教学反思
(一)成功经验
用校园场景导入很贴近学生生活,折纸操作让学生主动参与,能直观感知立体图形的特征。
(二)改进方向
部分学生折纸节奏慢,后续要准备分步示意图,多留个别指导的时间,让每个学生都能跟上操作节奏。

end

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  1. CONNECT:[ UseTime:0.001082s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001818s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.005060s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000794s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001762s ]
  6. SELECT * FROM `set` [ RunTime:0.001076s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001551s ]
  8. SELECT * FROM `article` WHERE `id` = 458346 LIMIT 1 [ RunTime:0.000982s ]
  9. UPDATE `article` SET `lasttime` = 1775896294 WHERE `id` = 458346 [ RunTime:0.005584s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000709s ]
  11. SELECT * FROM `article` WHERE `id` < 458346 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.004192s ]
  12. SELECT * FROM `article` WHERE `id` > 458346 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002550s ]
  13. SELECT * FROM `article` WHERE `id` < 458346 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007259s ]
  14. SELECT * FROM `article` WHERE `id` < 458346 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.012644s ]
  15. SELECT * FROM `article` WHERE `id` < 458346 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004254s ]
0.236916s