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深耕新教材 践行真数学——苏教版小学二、三年级数学新教材培训心得

  • 2026-03-24 00:27:02
深耕新教材 践行真数学——苏教版小学二、三年级数学新教材培训心得

         深耕新教材  践行真数学——苏教版小学二、三年级数学新教材培训心得

李有利

参加本次苏教版小学二、三年级新教材培训,让我对数学教学的本质有了更深刻的理解,也为后续的课堂实践明确了清晰的方向。

一、在“度量”的起点,建立数学与生活的联结

培训中,“课桌有多长”的探究活动给我留下了深刻印象。让学生用文具盒、铅笔、拃等不同工具去测量课桌长度,在得到“3个文具盒长”“4支铅笔长”“5拃长”的不同结果后,学生自然会产生疑问:“为什么同一个课桌,测量结果不一样?”

这个过程让我明白,教学不能直接告诉学生“要用统一单位”,而是要让他们在真实的矛盾中体会统一单位的必要性。这正是新课标中“让学生经历知识的形成过程”的生动体现。后续教学中,我会多设计这类源于生活的探究活动,让学生在动手操作中理解抽象的数学概念。

二、在“算理”的深处,打通知识的内在逻辑

培训对“两位数乘一位数”“两位数乘两位数”的编排解析,让我跳出了“只教算法”的惯性思维。比如计算36÷3时,教材引导学生先算30÷3=10,再算6÷3=2,最后10+2=12,这其实是在渗透“计数单位拆分与重组”的核心算理。

同样,两位数乘两位数的“图式相乘”策略,用方格图把14×12转化为14×10+14×2,本质也是将未知转化为已知。这让我意识到,教学要抓住“计数单位”这一主线,让学生明白算法不是孤立的步骤,而是算理的自然延伸,从而建立起更连贯的知识体系。

三、在“关系”的建构中,培养数学思维的核心

“简单数量关系”模块的设计让我收获颇丰。从“原来有5个苹果,又买来3个”的实际问题出发,通过改编问题、画图表达、列式解答等活动,学生能逐步理解“加数+加数=和”“和-一个加数=另一个加数”的内在联系。

这种从具体到抽象的过程,正是培养学生“模型意识”的关键。后续教学中,我会更注重引导学生用数学语言描述生活中的数量关系,让他们在解决问题的过程中,真正理解数学的工具性与逻辑性。

四、在“实践”的延伸里,感受数学的应用价值

教材中“我们的身体尺”“时间有多长”等综合实践活动,打破了数学与生活的壁垒。这些活动不仅能让学生巩固长度、时间等知识,更能让他们体会到数学在解决实际问题中的作用。这启发我在日常教学中要多设计跨学科、生活化的实践任务,让学生在测量、统计、探究中,真正爱上数学、用好数学。

这次培训不仅让我对新教材的编排理念有了系统认识,更让我深刻体会到:好的数学教学,不是教学生“记住什么”,而是引导他们“理解什么”“会用什么”。未来的教学中,我会带着这些思考,把培训所学转化为课堂上的生动实践,让每一个学生都能在数学学习中获得真正的成长。

——END——

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  1. CONNECT:[ UseTime:0.000375s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000588s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000560s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000276s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000521s ]
  6. SELECT * FROM `set` [ RunTime:0.000196s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000503s ]
  8. SELECT * FROM `article` WHERE `id` = 460830 LIMIT 1 [ RunTime:0.031103s ]
  9. UPDATE `article` SET `lasttime` = 1775475297 WHERE `id` = 460830 [ RunTime:0.000493s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000235s ]
  11. SELECT * FROM `article` WHERE `id` < 460830 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000861s ]
  12. SELECT * FROM `article` WHERE `id` > 460830 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002156s ]
  13. SELECT * FROM `article` WHERE `id` < 460830 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000918s ]
  14. SELECT * FROM `article` WHERE `id` < 460830 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.017999s ]
  15. SELECT * FROM `article` WHERE `id` < 460830 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.015606s ]
0.140290s