“玩魔术”:指向学生数学思维的外显表达
2021-10-20孙红婷
孙红婷
摘 要:魔术具有神奇的魅力,它除了可以满足我们的好奇和作为艺术欣赏之外,更重要的它还是一把开启儿童智能的钥匙。在数学课堂中拓展融合数学魔术启发学生探索数学问题,实践证明,数学魔术在激发学生数学学习的兴趣、帮助学生深入数学思考,发展学生思维外显表达等方面效果突出,通过对数学魔术的探索让人欣喜地看到学生的数学学习在真正发生。
关键词:数学魔术;有向开放;操作思考;数学表达
【中图分类号】G623.5 【文献标识码】A 【文章编号】1005-8877(2021)27 -0049-02
"Playing magic": pointing to the explicit expression of students' mathematical thinking
SUN Hongting (BaiCaoYuan primary school,Xinbei District,Changzhou City,Jiangsu Province,china)
【Abstract】Magic has magical charm. In addition to satisfying our curiosity and artistic appreciation,it is also a key to children's intelligence. Expand and integrate mathematical magic in mathematics classroom to inspire students to explore mathematical problems. Practice has proved that mathematical magic has outstanding effects in stimulating students' interest in mathematics learning,helping students to go deep into mathematical thinking and developing students' explicit expression of thinking. Through the exploration of mathematical magic,it is gratifying to see that students' mathematics learning is really happening.
【Keywords】Mathematical magic;Directed opening;Operational thinking;Mathematical expression
一、“玩魔术”的实践认知
(1)什么是“玩魔术”
“玩魔术”是一种表演艺术,它能抓住人们好奇、求知心理,通过制造奇妙的假象,变化繁多且让人难以捉摸,可以给观众带来惊奇体验。数学魔术是以数学原理或数学知识为内核,通过魔术展现的方式加以呈现的数学游戏化活动,在数学课堂的初始阶段,将数学核心问题包装成有趣的数学魔术。让学生在操作探究中“好奇”,在随后的数学自主探究活动中“懂理”,在同伴表达分享中“会玩”、在推理重建中“能创”,在数学课堂之外“乐享”。既蕴含数学的思维,又体现魔术的乐趣,做到寓教于乐,这样能吸引学生参与其中,学生观赏后获得身心上的愉悦感。
(2)为什么要“玩魔术”
“维基百科”对“数学”是这样介绍的:“数学利用符号语言,对结构、数量、变化以及空间模型等概念进行研究的一门学科。”在既往的课堂实践中教师发现,仅仅依靠书本和课堂是无法满足全部学生对与全部数学学习的要求的。……
