The Artisul D13 drawing tablet is as close as you're going to the Wacom Cintiq for hundreds less. This tablet plus into your PC or Mac and works as an extra monitor that you can draw on using the included pen.
Here is a link to the Tablet: http://www.amazon.com/gp/product/B017OMDHN8/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B017OMDHN8&linkCode=as2&tag=wacomalternat-20&linkId=MDZQHTDCPTOK5N66
To learn more about Artisul or to find out about Educational pricing check out their website:
Wonder what tools I draw with or what I use to make videos, check out my Gear: http://bradcolbow.com/mygear/