Objective: How can I make my own picture frame message board?

Which of the following solutions is more sound in terms of naive physics reasoning?

Possible answers:
a). To make these message boards, grab a picture frame and some paper then cut the paper to fit the frame and set it in behind the glass because the glass makes an excellent dry erase surface!.
b). To make these message boards, grab a picture frame and some paper then cut the paper to fit the frame and set it in front of the glass because the glass makes an excellent dry erase surface!.
a).