Exactly my thoughts when I saw this. The problem with writer obstructing the view can be solved by place the camera behind the board and using a translucent whi

Exactly my thoughts when I saw this. The problem with writer obstructing the view can be solved by place the camera behind the board and using a translucent white plastic sheet for the board. If the front of the board is illuminated well, then the camera shouldn't have any problems in capturing the stuff being written on the translucent board. Mirror the image in software and you are done!