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洛阳市苏明辉小学数学名师工作室·研修‖ 行而不辍 履践致远(五十三)

  • 2026-02-26 01:36:39
洛阳市苏明辉小学数学名师工作室·研修‖ 行而不辍 履践致远(五十三)

行而不辍   履践致远

——工作室研修记(五十三)

循“线”探“理”
共绘空间观念的思维图谱
在探索图形世界的奥秘时,当学生的目光开始追寻窗户的边框,当他们用工具画下第一组规范的垂线,当他们发现同一平面内两条直线特殊的“不相交”关系,关于“秩序”与“关系”的数学直觉便悄然苏醒。《垂线与平行线》单元的学习,是四年级学生空间观念与几何思维系统建构的关键一步。本单元的研讨,旨在探索如何引导学生在观察、操作、比较中,不仅掌握知识与技能,更经历从具体实物抽象出数学模型,并用数学语言精准定义的完整思维过程。

精准备课

为了更好的开展《垂线与平行线》单元的教学,四年级全体教师在认真研读了课标和教材、分析四年级学生由具体形象思维向初步抽象思维过渡的学情基础上,围绕本单元的核心目标,共同构建了“生活观察—操作体验—比较归纳—实际应用”的教学主线。备课聚焦于关键细节:如何选取典型的生活原型帮助学生建立“无限”表象;如何设计循序渐进的度量与画图活动以突破操作难点;如何通过对比与分类,引导学生主动建构知识网络。并将这些思考凝聚为一份整合了情境素材、分层活动与针对性支持策略的详细教学方案。

深度研课

12月17日下午,四、五、六年级数学教师围绕《垂线与平行线》的单元备课和教学课例开展集体研讨。邢孟平老师展示单元备课情况,从“核心素养、教材衔接、学生认知难点”等方面分析教学方向;张朝辉老师、李晓老师、杜蓓蓓老师、王倩老师、畅嘉慧老师先进行说课,再通过微课展示,系统全面地展示了集体备课的成果。
针对单元备课及微课展示,教师们分组研讨并提出改进建议及优化方向,包括教学内容的调整和课堂活动的组织,四年级老师结合意见进一步完善教学设计。

课堂展示

12月23日,张朝辉老师《认识射线、直线和角》一课通过对比探究,引导学生自主建构线段、射线与直线的联系与区别。在认识角的过程中,巧妙激活学生已有经验,放手让学生在探究中掌握新知。随后联系生活实际的分层练习,有效检验了学习目标的达成度。
12月24日,李晓老师《角的度量》一课,让学生以小老师的身份介绍自己对量角器的认识,借助大量的动手操作活动,细致捕捉学生在“重合”与“读数”环节的困难,并及时给予指导,把知识发生和发展的过程还给了学生。
12月25日,杜蓓蓓老师《角的分类》一课,借助课前制作的活动角,在动态中帮助学生生动、深刻地理解了各类角的本质特征。有效突破了概念教学的难点的同时,也让学生的空间观念在观察与思考中自然生长。 
12月26日,许宇博老师以“你能创造出互相垂直的两条直线吗?”开始了《画垂线》一课的教学。“你能利用身边的工具画出两条互相垂直的直线吗?”让学生的探究欲再一次被点燃学生在一个个问题的驱动下,积极探索、动手操作,利用多种工具进行尝试与创造。整节课学生思维活跃、动手充分,呈现了一节探究性强、活力十足的数学课堂。

12月29日,王倩倩老师的《画垂线》一课,由学生示范巧妙引入,并以此为核心,通过一系列递进式的关键追问:“你能看出他是怎么画的吗?”“你能把画法说得再具体些吗?”引导学生逐步将操作经验转化为清晰的语言表达和规范的作图方法。这种“以问引思”的设计,有效突破了教学难点,使学生不仅“会画”,更“懂其法”。

12月30日,邢孟平老师《认识平行线》一课,巧妙运用希沃白板投屏功能,实时展示学生的作图过程,并引导同伴进行即时点评与归纳。在此基础上,师生同步操作,将直观感知上升为规范方法,有效激发了学生的学习兴趣与实践自信。
12月31日,畅嘉慧老师《认识平行线》一课,借助学生喜爱的动画演示,生动演绎了平行线的多种画法,有效激发了学生的空间思维与探究兴趣。课堂寓教于乐,学生得以在直观体验中自然理解平行线的核心特征,并积极动手尝试,实现了知识与能力的同步提升。
每一次教学的实践,都是一次朝向理想的校准。当孩子们热衷于在纸上画、用量角器量时,如何更自然地引导他们从“随意”走向“严谨”,体会数学的精确之美?当描述从“歪的”、“正的”等生活用语过渡到“互相垂直”、“互相平行”的数学语言时,如何搭建更平缓的阶梯,让概念的抽象水到渠成?如何在“趣”与“理”之间寻找更精妙的平衡。将情境设计得更富挑战,将数学语言渗透得更加无痕,将思维的空间留给每一个跃跃欲试的头脑,我们才能呵护并激发那份从具象迈向抽象的勇气与兴趣。教学相长的旅程,正是在这般不断的观察、调整与深省中,探寻着更辽阔的可能。前行路上,我们将继续与孩子们并肩,在线的王国里,共同描绘出思维清晰而美好的轨迹。

图文:魏晓峰

编辑:魏晓峰

初审:杨静静

终审:苏明辉

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  1. CONNECT:[ UseTime:0.000530s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000730s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000381s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001710s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000510s ]
  6. SELECT * FROM `set` [ RunTime:0.000207s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000561s ]
  8. SELECT * FROM `article` WHERE `id` = 462184 LIMIT 1 [ RunTime:0.000410s ]
  9. UPDATE `article` SET `lasttime` = 1773034934 WHERE `id` = 462184 [ RunTime:0.003297s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000230s ]
  11. SELECT * FROM `article` WHERE `id` < 462184 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000412s ]
  12. SELECT * FROM `article` WHERE `id` > 462184 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000360s ]
  13. SELECT * FROM `article` WHERE `id` < 462184 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000516s ]
  14. SELECT * FROM `article` WHERE `id` < 462184 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000833s ]
  15. SELECT * FROM `article` WHERE `id` < 462184 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004672s ]
0.090179s