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AI赋能数学教具:四下 轴对称图形教学工具 -教师人工智能应用“用·创”优秀案例

AI赋能数学教具:四下 轴对称图形教学工具 -教师人工智能应用“用·创”优秀案例

原来四下《轴对称图形》这节公开课还能这么讲!这个AI可视化教具,直接把“轴对称”变得一目了然。

一、产品简介

本工具是一款面向小学中高年级数学教学的互动课件,围绕“轴对称图形”这一知识点设计。通过动画折叠、对称点补全、图形绘制等交互方式,帮助学生直观理解轴对称图形的特征(对称轴、对应点到轴的距离相等、图形完全重合等)。课件包含三个独立模块,可按教学进度自由切换。

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二、界面布局

顶部标签栏

  • 轴对称图形:演示图形沿对称轴翻折重合

  • 找对称点:在网格中点击补全对称点

  • 自动补全:自由拖拽图形端点,实时观察翻折变化

每个视图下布局略有不同,下面分模块介绍。

模块1:轴对称图形(折叠演示)

  • 左侧动画区:显示可翻折的图形(蝴蝶、京剧脸谱、交通标志等),中央红色虚线为对称轴

  • 右侧控制面板

    • 图形选择器(5种图形)

    • 手动翻折滑块(0°–180°)

    • 播放/重置按钮

    • 教学提示区

模块2:找对称点

  • 中央网格画布:包含一个半侧图形(如松树)和红色对称轴

  • 右上角任务说明

  • 右侧关卡选择:竖直轴、水平轴、倾斜轴

  • 撤销、重置按钮

模块3:自动补全

  • 左侧控制台:开始补全、重置、手动翻折滑块、不透明度调节、图形切换(松树/五角星/四边形)

  • 五角星专属:6种朝向(对称轴方向)选择

  • 中央Canvas区域:显示半侧图形(带字母标注)和可拖拽的端点,右侧实时显示翻折后的镜像

  • 拖拽端点时自动吸附到网格点,辅助线动态连接对称点


三、功能使用

  1. 切换模块

  • 点击顶部“轴对称图形”“找对称点”“自动补全”标签即可

  1. 轴对称图形模块

  • 选择图形:点击右侧的蝴蝶、脸谱、交通标志、银行标志、剪纸

  • 播放折叠动画:点击“播放”按钮,左半侧绕轴旋转至180°完全重合;可随时“重置”

  • 手动翻折:拖动滑块或直接输入角度,观察重合过程

  • 调节透明度:减弱图形颜色,方便观察背景网格

  1. 找对称点模块

  • 选择关卡:点击右侧的“竖直对称轴”“水平对称轴”“倾斜对称轴”

  • 寻找对称点:在网格中点击你认为对称点的位置,系统会判断是否正确(蓝色为正确,红色为错误)

  • 连线:点击两个蓝色点可连接成线段,表示对称关系

  • 撤销/重置:回退上一步或清空当前关卡所有点

  1. 自动补全模块

  • 切换图形:点击“松树图形”“五角星”“四边形”

  • 五角星朝向:五角星模式下,下方会出现6个朝向按钮(尖角朝上/右/下/左、斜向上/下),动态改变对称轴倾斜角度

  • 拖拽端点:用鼠标拖动图形上的字母圆点,改变原始图形形状,右侧镜像会实时跟随翻折

  • 翻折演示:点击“开始补全”播放从展开到重合的动画,也可手动拖动滑块

  • 不透明度调节:降低图形透明度,便于对照网格“数格子”

  1. 智能辅助

  • 对称辅助线:当翻折角度大于5°时,自动绘制从原始点到镜像点的虚线,帮助学生理解对称点连线与对称轴垂直且距离相等

  • 端点标签:原始点标为A、B、C…,翻折后对应点标为A、B、C…,偏移位置智能适应轴方向


四、教学建议

  1. 先观察后操作 在“轴对称图形”模块中,先让学生观察不同图形沿对称轴对折的过程,建立“重合”概念。

  2. 数格子找对称点 在“找对称点”模块,引导学生数格子(网格间距40px),说出对称点到轴的距离,再点击验证。

  3. 自由绘制与探究 在“自动补全”模块,鼓励学生拖拽端点创造自己的图形,观察镜像如何变化,理解“任意形状都有对称的另一半”。

  4. 五角星多朝向对比 通过改变五角星的朝向(尖角在不同方向),让学生发现对称轴可以是任意方向,但轴对称的本质不变。

  5. 小组竞赛 使用“找对称点”关卡,看谁能在最短时间内正确补全所有点。

  6. 融合现实 展示生活中的轴对称实物(蝴蝶、脸谱、建筑),再回到课件中对应图形,加深联系。


五、注意事项

  • 浏览器兼容:建议使用Chrome、Edge、Safari最新版,部分动画依赖CSS 3D和p5.js库。

  • 语音功能:部分音效需要用户首次点击页面授权(浏览器自动限制)。

  • 触屏操作:在平板或希沃上可直接用手指拖拽端点、点击按钮,交互流畅。

  • 重置与刷新:刷新页面会重置所有方案到默认状态(五角星恢复尖角朝上、松树恢复默认形状)。

  • 网格吸附:拖拽端点时会自动吸附到最近的网格交点,便于精确对齐。

  • 多方案对比:当前版本未在“自动补全”模块内置多方案对比,但可通过拖拽生成不同形状后用“重置”恢复,或切换图形再切回来。

配套的操作流程简单清晰,支持重复尝试与对比优化,学生不仅学会了计算,更学会了分析与选择。让课堂更有参与感,老师们快来试试吧!这块教具是可以本地化运行的html文件,不需要联网、不需要复杂的部署,直接插入希沃就可以使用,老师如果有赛课需求也可以参考这个进行定制,获奖概率倍增!

联系赵老师获得技术支持:bj1gk2(备注:教具)

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  1. CONNECT:[ UseTime:0.000585s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000671s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001052s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001392s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000531s ]
  6. SELECT * FROM `set` [ RunTime:0.004072s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000718s ]
  8. SELECT * FROM `article` WHERE `id` = 601899 LIMIT 1 [ RunTime:0.000478s ]
  9. UPDATE `article` SET `lasttime` = 1778474785 WHERE `id` = 601899 [ RunTime:0.003135s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000257s ]
  11. SELECT * FROM `article` WHERE `id` < 601899 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000424s ]
  12. SELECT * FROM `article` WHERE `id` > 601899 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000478s ]
  13. SELECT * FROM `article` WHERE `id` < 601899 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000657s ]
  14. SELECT * FROM `article` WHERE `id` < 601899 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000690s ]
  15. SELECT * FROM `article` WHERE `id` < 601899 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006210s ]
0.102103s