gakuen Alice is not complete but you can watch it at www.crunchyroll.com or read the manga at www.onemanga.com, www.manganovel.com, www.mangavolume.com, www.mangafox.com, www.mangahut.com, etc
Install RealPlayer and then check out www.realitylapse.com. It's where i downloaded it!
Or you can download it and watch it at
http://www.animea.net/download/105/Gakuen+Alice.HTML or