Google Classroom
GeoGebraGeoGebra Classroom

Geoboard Math for Teachers

A. GeoGebra Geoboard

B. The Math Learning Center〈Interactive Geoboard〉

B. The Math Learning Center〈Interactive Geoboard〉
https://www.mathlearningcenter.org/resources/apps

D. Geoboard image

D. Geoboard image

2S4 worksheet: Pinboard Triangles and Quadrilaterals

3S2 EdUHK Animated Singalong Mathematics〈Triangle〉

3S2 EdUHK Animated Singalong Mathematics〈Triangle〉
https://evideo.eduhk.hk/hapi/v1/contents/permalinks/Fr6d5D9K/view

3S2 nrich〈Name That Triangle〉

4S2 Dissection of an isosceles trapezium

4M1 The Fence Problem

5M1 The Farmer's Gift

5M1 Pick's Rule 1997/04/11

5M1 Alex CHIK〈Pick's Formula〉

5M1 蔡聰明〈談求面積的Pick公式〉