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小学科学新课标教案-苏教版三年级下册织布机非遗传承主题教学方案

  • 2026-04-09 08:03:40
小学科学新课标教案-苏教版三年级下册织布机非遗传承主题教学方案

老师,我的彩虹毛衣是怎么做出这么多颜色的呀?”“为什么衣服摸起来有的软有的结实?” 8-13 岁的小朋友们,每天穿着五彩斑斓的衣服,却很少有人知道,这些布料背后藏着一场 “线的穿梭游戏”! 

今天,我们就带着材料包变身 “小小织布匠”,用 30 分钟解锁彩线穿梭的奥秘,还能顺便搞懂地理课上的经纬线,让科学和生活撞个满怀~ 

动手时间!彩线穿梭 DIY 指南 

🔍 先认识我们的 “魔法材料包” 

打开材料包,你会看到彩棉线、A*2、B*2、C、压板、插销*4、梭子 —— 这些看似简单的零件,正是迷你版织布机的核心成员!它们虽然小巧,却和古代织布机的原理一模一样,接下来就跟着步骤,让彩线 “跳起舞” 吧~ 

🧵 三步织出专属 “小布匹” 

1. 固定经线:先把框架摆平稳,将彩色棉线均匀缠绕在框架两侧,这些竖直排列的线就是 “经线”,就像织布的 “地基”,要拉得松紧适中才不会歪哦! 

2. 穿梭纬线:用综把经线分成上下两层,形成一个 “小通道”,再拿着穿好彩线的梭子,从通道里来回穿过 —— 这根横向移动的线就是 “纬线”。每穿一次,就用梳扰把纬线压紧,让经线和纬线紧紧 “抱在一起”。 

3. 解锁花纹:想织出不一样的图案?试试换不同颜色的纬线,或者调整综的位置改变经线的上下层,很快你就能得到一块独一无二的小布料啦! 

💡 制作小锦囊 

遇到经线缠在一起的情况别着急,用小剪刀轻轻分开就行;梭子穿梭时要慢慢走,避免彩线打结~ 完成后别忘了和小伙伴分享:你用了几种颜色?制作时最难的一步是什么? 

科学小课堂:织布机的 “工作密码” 

其实我们做的彩线穿梭,就是古代织布机的 “迷你复刻版”!真正的织布机虽然更大更复杂,但核心结构完全一样 —— 框架支撑整体,综负责分开经线,梭子带着纬线穿梭,梳扰让布料更紧实。 

关键原理:织布的秘密就在于 “经纬交织”!竖直的经线和横向的纬线像好朋友一样交叉搭配,穿得越紧密,布料就越结实。我们穿的棉布、丝绸、毛衣,都是这样一点点织出来的~ 

知识大跨界:布料里藏着地理知识? 

你发现了吗?织布机的 “经线” 和 “纬线”,和地球仪上的线名字一模一样!地理课上我们学过: 

地球仪上竖直连接南北两极的线,叫做经线; 

水平环绕地球、与经线垂直的线,叫做纬线。 

就像经线和纬线纵横交错构成地球的 “坐标网”,织布机的经纬线交织出了各式各样的布料 —— 原来科学知识从来都不是孤立的,生活里藏着太多跨学科的小惊喜! 

课后小任务 

1. 用今天织的小布料做个钥匙扣、书签,送给爸爸老师当礼物吧; 

2. 观察家里的衣服,找找布料上的经纬线痕迹,说说它们是怎么交织的; 

3. 发挥想象力:如果给织布机加上更多颜色的线,或者改变穿梭的规律,能织出什么特别的图案? 

从一根彩线到一块布料,从手工实验到地理知识,科学就是这样有趣又实用~ 下次穿衣服时,别忘了想起这场 “彩线穿梭的魔法”,也记得和同学分享你解锁的科学小秘密呀! 

更多教案

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  1. CONNECT:[ UseTime:0.000919s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000797s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000319s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000284s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000541s ]
  6. SELECT * FROM `set` [ RunTime:0.000234s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000557s ]
  8. SELECT * FROM `article` WHERE `id` = 474211 LIMIT 1 [ RunTime:0.000385s ]
  9. UPDATE `article` SET `lasttime` = 1775980681 WHERE `id` = 474211 [ RunTime:0.003176s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000462s ]
  11. SELECT * FROM `article` WHERE `id` < 474211 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000439s ]
  12. SELECT * FROM `article` WHERE `id` > 474211 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000377s ]
  13. SELECT * FROM `article` WHERE `id` < 474211 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000600s ]
  14. SELECT * FROM `article` WHERE `id` < 474211 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000684s ]
  15. SELECT * FROM `article` WHERE `id` < 474211 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000980s ]
0.157022s