GeoGebra Institute of Hong Kong (GIHK) is
an independent and self-sustaining community of practice

 Our goals:
1. To build teachers’ capacity for using GeoGebra to enhance learning and teaching through organizing seminars and training workshops at different levels;

2. To foster the use and sharing of GeoGebra materials through the provision of user-friendly sites with a depository of the shared materials categorized according to the Hong Kong curriculum;

3. To improve the uses and designs of GeoGebra materials through conducting related studies and research.
 Share with us:To share a GeoGebra file with us, please:upload it to GeoGebraTube;post the GeoGebraTube link in our Facebook page facebook.com/hkggb or email it to us (geogebra.hk@gmail.com).We shall put it in a suitable position in our depository of materials.

#### What's New

28 Feb 2021:      Addition of Directed Numbers
Subtraction of Directed Numbers
(Ver. 1)
Subtraction of Directed Numbers
(Ver. 2)
5 Jan 2021:       Addition of Directed Numbers
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:   (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
21 Jun 2019:    (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
18 May 2019:   GeoGebra 進階工作坊
18 May 2019:   GeoGebra 初階工作坊
30 Apr 2019:    Rotation in Cartesian Plane
30 Apr 2019:    直角坐標的旋轉變換
30 Apr 2019:    Rotation of a Point
30 Apr 2019:    一點的旋轉變換
29 Mar 2019:   以分數比較數量
29 Mar 2019:   Bearings
29 Mar 2019:   Similar 3D Figures
19 Jan 2019:   1-digit number
17 Dec 2018:  Errors in Measurement
17 Dec 2018:  量度的誤差
23 Nov 2018:  Area of Parallelogram
23 Nov 2018:  平行四邊形面積
19 Nov 2018:  Lines in a Triangle
19 Nov 2018:  Centres in a Triangle
27 Sept 2018: 五位數的位值
27 Sept 2018:
27 Sept 2018: 四位數的位值
27 Sept 2018:
27 Sept 2018: 三位數的位值
27 Sept 2018:
30 Apr 2018: Same Denominator
30 Apr 2018: 同分母分數加法
30 Apr 2018: Same Denominator
30 Apr 2018: 同分母分數減法
24 Mar 2018: 構作放大圖形
2 Jan 2018: Graph Plotter 2018
2 Dec 2017: 百變火柴 Magic Matches
火柴 100 Matches 100
1 Dec 2017: 閱讀月曆
Math24 (with solutions)
14 Nov 2017: 水位繪圖工具
6 Nov 2017: 圖形的周界
27 Sept 2017: 幾個一數  Skip Counting
12 Mar 2017: GeoGebra per la scuola elementare
(GeoGebra for Elementary Schools)
1 Feb 2017: Article:
促進 STEM 教育的 GeoGebra 課程
GeoGebra Courses for STEM

19 Apr 2016: New domain name of this site: www.geogebra.org.hk

11 Nov 2015: GeoGebraBooks 錐體建築師球體建築師

28 Aug 2015: "My World My Math!" video created by GeoGebra and Microsoft

22 May 2015: GeoGebraBook 4N6 小數一：基本概念（百格圖、電子米尺、電子磅及電子量杯）

22 Mar 2015:
GeoGebraBooks

GeoGebra Infographic (English Version):

GeoGebra 資訊圖（繁體版）

GeoGebra 资讯图（简体版）

4 Nov 2014:
GeoGebraBooks

20 Jun 2014: Coming workshops:

7 Dec 2013: Coming workshops:

29 Oct 2013: Diagonal Problem by davidcox