To avail the Adobe Acrobat XI Pro Student and Teacher Edition you can go to this page and download the product after buying it at a discount.
Adobe Discounts, Deals and Coupon Codes. 80% Off Adobe Student And Teacher Edition Software: Acrobat X Pro $24, Photoshop.
The price I found on Adobe's site is around $544 USD!:eek: That's an insane price to pay for a program just to edit PDFs I haven't found any. Popular Videos - Adobe Acrobat & Download