The American Mathematical Society (AMS) was founded in 1888 to further the interests of mathematical research and scholarship. They serve the national and international community through their publications, meetings, advocacy and other programs, which
* promote mathematical research, its communication and uses,
* encourage and promote the transmission of mathematical understanding and skills,
* support mathematical education at all levels,
* advance the status of the profession of mathematics, encouraging and facilitating full participation of all individuals,
* foster an awareness and appreciation of mathematics and its connections to other disciplines and everyday life.
You can order a free 16-month Wall Calendar for 2011-2012 along with various posters, including one with a picture from the movie, Avatar.
From their website, "To order please email the AMS Public Awareness Office at: paoffice at ams dot org with "poster order" in the subject line."
This offer is only valid for residents of: