14 science classroom door decorations posters create this Chemistry Chat bulletin board. Complement your AP chemistry curriculum. This science classroom décor uses the periodic table of elements. Simply print & post in your classroom. Perfect for a middle or high school science classroom chat. I used Manganese Mn, titanium Ti, and radium Ra, for M, T and R, in order to make the sign work.I offer both white on black & black on white options. See the preview. :) You might also like: Science is C