SlideRocket EDU is a wonderful new spin-off site from SR & Google. For a user to take advantage of thie educational tool/portal is a Google Apps Education Administrator account. This great site is all online, excellent for collaboration, and creates stunning presentations.
I highly recommend checking out SlideRocket EDU by clicking here!!!
For a much more detailed review check out Free Technology 4 Teachers.
For my top 10 sites for creating a slideshow/presentation click here.