Tech Tutor Mark uncovers the best and most useful tech sites, resources and tips for everyone from the home user to the educator. Some of these tips are WOW inducing; others life changing. The majority are just plain cool, but all are extremely useful for anyone who uses technology and wants to learn more.
I found this nice collection of iPad Apps for Educators on SlideShare. As you can see, what makes it unique and particularly useful is that it is organized by grade level. Free apps list from Gary Toews