Ok. I admit. This one isn't something you just run out to the store and buy. They're pricey, but OH SO WORTH IT! Imagine this... In your school, a child is homebound due to illness, physical limitations, or some other inability to physically attend school. Sure...using Skype or Hangouts on a laptop works, but it's no where near as "freeing" as being able to control your own ability to move about, look at things, and interact with others.
However, here's another reason to look at the Double Robotics telepresence robot. It allows teachers to teach! Yup! We've had a few instances of teachers who've been homebound due to conditions that prevented them from coming to school, but not from being able to teach. These devices allow teachers to connect via their laptops, drive the robot down to their classrooms and teach the kids! I actually used one from a hospital room! I got to teach, the kids loved it, and everyone was able to continue as if I was present in the classroom.
You can buy one, but if you have a child who needs one, there is an organization here in Maine called Grahamtastic Connection that can lend one to your student!