Teenagers on Internet

Internet is everywhere, even you live in the countryside, you can connect the world through WIFI.
Teenagers may have to learn how to protect themselves from stalkers.
For instance, open a course in high school teaching precaution on cyberbullying.

source:
http://www.pbs.org/wgbh/pages/frontline/kidsonline/
http://www.cbsnews.com/video/watch/?id=6797340n
https://www.youtube.com/watch?v=2yha7oa21YM&feature=relmfu

Social Media Changes the World.

President Obama used the internet win his presidency. 
Nowadays's social media is so powerful as the traditional media like newspaper. 

source:http://fgamedia.org/faculty/rdcormia/COIN83/pdf/How%20Obama%20Really%20Did%20It.pdf

World Wide Web as a Library

The internet has good and bad sides, it depends on how we use it.
The information that the internet provides may be wrong, as users we have to distinguish them through our knowledge.

source:http://spectrum.ieee.org/computing/networks/the-world-wide-web-is-very-goodand-very-bad