Twenty-five assorted websites, some with a student audience, are participating in a computer giveaway between 12 August and 9 September. I have no connection with any of this, except my friend in NZ Mauricio Freitas of GeekZone has put up a convenient website BacktoSchoolGiveaways that will let you reach all the participating sites. Each site will devise its own competition, so if you are keen, you should visit them all in turn during the period of their contests and try your luck.
The prizes look quite tempting – each site has a prize bundle that includes a laptop, an operating system, some software and a backpack. Good luck.