I have been looking for a way for a teacher to share his screen with his students and have students reflect up onto the Smartboard. My first thought was an Apple TV, however his class is comprised of PC and Apple users with varying Operating Systems. Next years freshman will be coming in with Mountain Lion and beyond so we will be fine in the classroom and for the others we could purchase Air Parrot, 5 seat licenses for $39.99. The other option I tossed about was just a simple remote desktop login. I tried several but by far the easiest was ScreenLeap no downloads, no installs, no sign ups. So, if your classroom doesn't have an Apple TV and you are interested in reflecting student screens up to the Smartboard try using ScreanLeap. Simply use ScreenLeap to login to the student laptop and project your laptop screen to the Smartboard.