For the service and communication subject in school we had to hold a 15 minute speech about a subject which interests us. I did of course pick game design, more specificly the phases involved.
It's in danish, but you will probably understand some of it regardless of if speak danish or not.
Powerpoint presentation:
http://thefuture.dk/skole/sok/Faser%20i ... 20spil.ppt
Script:
