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小手量天下,一拃一庹趣味多 ——安阳市南关小学一、二年级数学综合实践活动纪实

  • 2026-02-26 02:03:49
小手量天下,一拃一庹趣味多 ——安阳市南关小学一、二年级数学综合实践活动纪实

为落实新课标中“数学源于生活、用于生活”的核心理念,让二年级学生在实践中感知长度单位,体会数学与生活的紧密联系,南关小学低年级组于近期开展了“小手量天下,一拃一庹趣味多”主题实践活动。活动以“用身体当尺子”为核心,通过动手操作、合作探究的方式,让学生在趣味测量中积累数学经验,提升实践能力,取得了良好的教学效果 

一、 精心教研,周密部署

活动开展前,全体数学教师从流程设计、测量工具准备、学生分组安排,到活动安全注意事项、成果记录方式等,都进行了细致规划。最终确定以“自主探究+合作实践”的形式,分“拃”“庹”“步”的测量三个环节开展活动,确保活动有序、高效推进。

二、 趣味实践,快乐测量

     (一) 拃量身边物,探索小秘密

在老师的引导下,学生们先认识“拃”:将手掌张开,大拇指指尖到中指指尖的最大距离,就是一拃。为了保证测量标准统一,老师示范并强调测量时手掌要自然张开,不能刻意拉伸或收缩。

随后,学生们两人一组,用自己的“拃”测量身边的物体。有的测量课桌的长和宽,边量边数“1拃、2拃……”,认真记录数据;有的测量自己的课本、文具盒,对比不同物体的拃数差异;还有的测量衣服,教室的门板、窗户的边框,在测量中发现“同一个物体,用不同同学的拃去量,结果不一样”的小秘密。

(二) 庹量长物体,验证大猜想

认识“庹”的环节,老师先向学生讲解:两臂平伸,两个中指指尖之间的距离,就是一庹。老师现场示范,双臂与肩同高,自然平伸,让学生直观感受一庹的长度。同时提出猜想:“我们的一庹长度,和自己的身高有关系吗?”

带着这个疑问,学生们分组开展测量。一组学生用庹测量黑板的宽度,一人伸直双臂固定起点,另一人在终点做好标记,依次接力测量,算出黑板的庹数;另一组学生测量教室的长度,在合作中感受“庹”适合测量较长物体的特点。测量结束后,学生们对比自己的身高和一庹的长度,惊喜地发现“一庹的长度差不多等于自己的身高”。

(三) 步量大场地,挑战新任务

 “步”的测量环节,老师先明确:正常走路时,后脚脚跟到前脚脚跟的距离,就是一步。老师提醒学生,测量时要保持正常的走路姿势,不能刻意迈大步或小步。

本次测量的任务是教学楼的长度和走廊的长度。学生们分成若干小组,每组推选一名记录员。从教学楼的一端出发,学生们边走边数步数,记录员认真记下每组的步数。有的小组还进行了往返测量,对比两次的步数是否一致。在测量走廊长度时,学生们还尝试了“估一估再测一测”的方法,先估计走廊的步数,再实际测量验证,在趣味挑战中提升了估算能力。

三、 活动总结,收获满满

活动结束后,各班召开总结班会。学生们分享自己的测量成果和发现,纷纷表示“原来不用尺子也能测量”“数学就在我们的手上、脚下”。老师们对学生的表现给予肯定,并引导学生总结:身体尺虽然方便,但因为每个人的身体条件不同,测量结果会有差异,所以在需要精确测量时,还是要用到标准尺子。

此次实践活动,让学生在“玩”中学,在“做”中悟,不仅掌握了用身体尺测量的方法,更培养了观察、合作、探究的能力,真正让数学知识走进了生活。

编辑:梁   斌

校对:张红春

审核:董晨毅

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  1. CONNECT:[ UseTime:0.000664s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001044s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000352s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000257s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000514s ]
  6. SELECT * FROM `set` [ RunTime:0.000176s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000589s ]
  8. SELECT * FROM `article` WHERE `id` = 462280 LIMIT 1 [ RunTime:0.000837s ]
  9. UPDATE `article` SET `lasttime` = 1772960023 WHERE `id` = 462280 [ RunTime:0.008775s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000216s ]
  11. SELECT * FROM `article` WHERE `id` < 462280 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000443s ]
  12. SELECT * FROM `article` WHERE `id` > 462280 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000373s ]
  13. SELECT * FROM `article` WHERE `id` < 462280 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003478s ]
  14. SELECT * FROM `article` WHERE `id` < 462280 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001041s ]
  15. SELECT * FROM `article` WHERE `id` < 462280 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001746s ]
0.087398s