Light Bulb Problem
課堂掠影
燈泡問題 ppt
SEESAW
燈泡DIY
References
Locker Problem
https://media.pk12ls.com/curriculum/math/cmp3/activities/A82387/index.html
100 Light Bulbs
https://www.geogebra.org/m/mgvdneee
Extended Study: Circuits & Traffic Lights
https://www.geogebra.org/m/m6xjcmnf