crunchyroll.com , goodanime.net , <----if you cant find it on these websites just use YouTube, also chrunchyroll.com gets past school computer systems :D
TurboNick (dot com)
I used uanime.com.
pinoyanime.tv in the cartoons section.
Absolutely not,only book 1,2 and 3. Watch all avatar episodes here for free - http://avatardestinyportal.com/
You probably don't want to hear this, but I'd say netflix. It costs money I know. But, its like $10 and totally worth it. You can order movies and they also have all three seasons available to watch on your computer so you don't have to order them in the mail. I love netflix :P megavidio is great tv.blinkx.com/shows then type it in free http://www.divxden.com/chs9onflo21b/The_Last_Airbender_2010_Encoded_XviD_good_quality.avi.html this a direct link to watch the movie
On the cbbc iplayer of course!
Hulu.com or maybe toonsai.com
Avatar's page on Nick.com. It's under "episode guide."
All of the 'Avatar the Last Air Bender' seasons and episodes can be found on Amazon Prime.
go to youtube.com just type in avatar the last airbender episodes and from there it should give you links to some different sites.
If you want to watch it online then http://www.surfthechannel.com/ is a good place.
Youtube
You can watch them at Kumby.com
on netflix
youtube
go to movies-links.tv
pinoyanime.tv in the cartoons section.
well, actually it already aired. you can watch it online in you tube. You can also watch it on anime sites like dubhappy.com and animfreak.tv
we can watch ishaan Disney episodes online at videos.apnicommunty.com