I would like to give some private math classes online and for this purpose I currently use this pen: Wacom Bamboo Pen Tablet. The problem is I cannot see directly where I am writing. I'm thinking about buying a Samsung Galaxy Note 10.1" and using its pen to give my classes. I would like to know if there is another tablet available which would better suit my purposes, or if there is good software to use with Galaxy note in order to give classes.
What I'm looking for is software similar to this site [the video is in portuguese].