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小班数学优秀教案及教学反思《认识三角形》

  • 2026-06-13 10:48:47
小班数学优秀教案及教学反思《认识三角形》

【活动目标】

  1.认识三角形的特征,知道三角形由3条边,三个角。

  2.能将三角形和生活中常见实物进行比较,找出和三角形相似的物体。

【活动准备】

  1.PPT一份,大三角板一个,长短不同的小棒,雪糕棒等

【活动过程】

  一.导入:手指游戏:快乐的小鱼

  二.学习三角形特征

  1、认识三角形

  (1)出示魔法线昨天张老师得到了一根魔法线,我今天把他带来了,让我们一起把它叫出来。123,请出来。

  (PPT出现一根红色的魔法线)提问:它是什么颜色的?

  (2)第一次变化这跟魔法线他会变,让我们一起喊123,看他会变成什么?。来.源屈.老师教.案网,(孩子们一起喊123,PPT出现三根红线)提问:数一数变成了几根线,(3)第二次变化(孩子们一起喊123,PPT出现一个的三角形)又变成了什么?(三角形)

  (4)触摸三角形老师这里也有一个大的三角形,我请小朋友们来摸一摸,他是不是有三条边,三个角。

  (5)又一次变化一个三角形又变出了好多的三角形,虽然它们的大小不同,但他们都是三角形。

  2、巩固三角形特征

  (1)引导幼儿观察图形,发现三角形的特征。

  前几天张老师去旅游。到了一个神奇的国家,三角形王国,他们这里的东西都是三角形的,老师把他拍了下来今天和你们一起来分享(继续看PPT,出示各种各样的三角形物品)A钟表店 B食品店 C帽子店

  (2)再来找一找王国里还有哪些东西是三角形的(许多小旗子,屋顶,冰淇淋,标志牌等)

  (3)引导幼儿在活动室里找一找三角形的物品3、.老师小结三角形特征,使幼儿获得的知识完整化。(出示最后一张PPT)今天你们表现真棒,找到了这么多三角形的物品,他们虽然长得不一样,(不同形状,不同大小)但都有三条边,三个角;有三条边,三个角的图形都是三角形。

  三.复习三角形的特征提供冰糕棒、小木棒供幼儿拼三角形,巩固认识其三角形。

【活动反思】

  小班幼儿的思维是具体形象思维,用变魔术的形式引出开头吸引孩的注意,通过变一边、摸一摸、看一看、找一找、摆一摆等,做了三角形等一系列活动,使每位幼儿在广阔的活动和认识空间在拼拼摆摆的过程中加深对三角形的认识,老师及时的小结使孩子获得知识的完整性。虽然生活中属于三角形的物体少一些,但孩子们能积极参与并观察,找到了好多的环境中的三角形。

教案原文链接地址

https://www.qulaoshi.com/xiaoban/shuxue/40310/

(长按复制上面网址,用手机或电脑的浏览器打开。)

福利:公众号内回复【领图片】可以免费获取两千张PPT图片素材哦~

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  1. CONNECT:[ UseTime:0.001198s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001683s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004654s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.008593s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001660s ]
  6. SELECT * FROM `set` [ RunTime:0.001476s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001554s ]
  8. SELECT * FROM `article` WHERE `id` = 512500 LIMIT 1 [ RunTime:0.011571s ]
  9. UPDATE `article` SET `lasttime` = 1781353695 WHERE `id` = 512500 [ RunTime:0.023947s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000755s ]
  11. SELECT * FROM `article` WHERE `id` < 512500 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.010747s ]
  12. SELECT * FROM `article` WHERE `id` > 512500 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006020s ]
  13. SELECT * FROM `article` WHERE `id` < 512500 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.050057s ]
  14. SELECT * FROM `article` WHERE `id` < 512500 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.034755s ]
  15. SELECT * FROM `article` WHERE `id` < 512500 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.078666s ]
0.318037s