- http://www.wolframalpha.com/
Most scientific data can be found from this website.
- http://radian.com.hk/etextbook/
Supplementary learning materials for HKDSE Physics
- http://www.howstuffworks.com/
Interesting scientific knowledge in daily life.
- https://www.youtube.com/watch?v=YmafohV2RX8
Amazing science experiments that can do at home.