http://web.cps.msu.edu/~dunhamda/dw/invent.html
It is a site which talks about the beginning of skateboarding in the 70's.On this site we learn how the first skateboard was build,and the differents evolutions in skateboarding.It talks about the difficulties of beginning to skateboard (falls;broken leg,hand).

http://www.skateboardvideos.net/
On this site there are a lot of trick on video and skatemagazine.You can learn some tricks by watching the videos.

http://www.exploratorium.edu/skateboarding/
This website is a sort of mini-skateboarding encyclopedia.We can read  a short history of skateboarding,explaination of skateboarding tricks,their origines, the sciences and technics in skateboarding, and a very complete glossary. It's skateboarding seen by a scientist.

http://www.skateboard.co.uk/project/features/dictionary/
It's a complete skateboard dictionary which presents all the words which are used in skateboarding in alphabetic order.