What's New

26 Mar 2025 比較同分母分數
比較分子是 1 的分數
比較同分子分數

25 Mar 2025 Slope of a Straight Line: Run and Rise
Value of Slope
Slopes of Parallel Lines
Slopes of Perpendicular Lines
直線的斜率：水平變化 & 鉛垂變化
斜率的值
平行線的斜率
垂直線的斜率

18 Mar 2025 Matrix and Linear Transformation
Transforming a Point by a Matrix
Matrix Multiplication

11 Mar 2025 以竹簽拼砌三角形

11 Mar 2025 Similar Solids

23 Jan 2025 Comparing Two Quantities by Percentage

23 Jan 2025 百分數及其應用

12 Aug 2024 Sum of Numbers in Throwing Two Dice

7 Aug 2024 Number of Heads in Tossing Two Coins

23 May 2024 Enlarging / Reducing a Figure

23 May 2024 探究三角形的面積
Exploring the Area of a Triangle

23 May 2024 Explore Relationships among Angles, Arcs and Chords
Relationship between Angles at the Circumference and Arcs

23 May 2024 排水法

23 May 2024 圖形拼砌

12 Jul 2023:  Graphing Exponential Functions
Graphs of y=a^x and y=(1/a)^x
Graphing y=log(a, x) from y=a^x
Graphs of y=a^x and y=log(a, x)

20 Jun 2023: Online sharing: part 1 ; part 2 

20 Jun 2023: Simple examples for beginning teacher users 

19 Aug 2022: Quadrilaterals with 4 Equal Sides

7 Apr 2022: 繪畫正方形

7 Apr 2022: 繪畫長方形

7 Apr 2022: 繪畫梯形

30 Mar 2022: HCF 和 LCM 的應用

29 Mar 2022: 正方形的邊長和周界

29 Mar 2022: 長方形的周界與長和闊的關係 (學生版)

29 Mar 2022: 長方形的周界與長和闊的關係 (教師版)

29 Mar 2022: 已知長方形周界和長求闊

29 Mar 2022: 巧算周界

28 Mar 2022: 砌長方形找因數

25 Mar 2022: 倍數  

25 Mar 2022: 鋪紙條找公倍數和 LCM

25 Mar 2022: 因數

25 Mar 2022: 公因數

25 Mar 2022: 兩組對邊相等的四邊形（三年級）

25 Mar 2022: 繪畫平行四邊形

24 Mar 2022: JCDS 小學數學科 GeoGebra 資源

17 Mar 2022: A fraction of a set of objects

14 Mar 2022: Measuring Pi

14 Mar 2022: Measuring Diameters and Circumferences

9 Mar 2022: Sharing Things、Dividing Things

8 Mar 2022: 分物活動 1、分物活動 2

7 Mar 2022: Volumes of Cuboids、長方體的體積

4 Mar 2022: Find the hypotenuse of a right-angled triangle

4 Mar 2022: 求直角三角形的斜邊

4 Mar 2022: 圓周與直徑的關係、量度圓周率

4 Mar 2022: 一組物件的幾分之幾是多少？

08 July 2021: GeoGebra 學院(香港) 線上活動 

28 Feb 2021: Subtraction of Integers (ver. 2)

28 Feb 2021: Subtraction of Integers (ver. 1)

28 Feb 2021: Addition of Integers

5 Jan 2021: Subtraction of Directed Numbers

5 Jan 2021: Addition of Directed Numbers

30 Nov 2020: Analyze the Graph of a Function

30 Nov 2020: Is y a function of x?

30 Nov 2020: Graph of y = ax²

10 Jan 2020: Several Fraction Bars

17 Sept 2019:   Exploring Congruence of Triangles

17 Sept 2019:   (Updated on 17 Sept 2019)

13 Sept 2019:   Angle Sum of a Triangle by

13 Sept 2019:   Paper Folding

21 Jun 2019:    拼砌三角形 (五邑鄒振猷學校黃昭雲老師提供)

19 Jun 2019:    Making Similar Triangles

16 Jun 2019:    分數除法應用題

04 Jun 2019:  Percentages and Their Applications

18 May 2019:   透過 GeoGebra 進行數學研究工作坊

18 May 2019:   GeoGebra 進階工作坊

18 May 2019:   GeoGebra 初階工作坊