So, we held our little costume contest. There were 31 entries(!) and all 2012 participants are pictured below. Based on discussion at the #globalmath costume party, I learned we’ve been doing this since 2009. History: 2011, 2010, 2009
First Place
@jreulbach 
Julie receives a hanging organizer from the Container Store. These babies were all the rage at Twitter Math Camp this summer. I love mine because I hang it near the door and fill it with handouts. “Did I miss anything?” is a question I refuse to answer. I just point at the organizer.
Second Place
Tie!
as 
and
as 
Justin and Timon will have to fight it out over graph paper composition books and Command Strip adhesive poster strips.
Several math teachers swear by the graph paper comp books for their Interactive Notebooks, saying it helps kids organize their problem solving (not to mention, it provides a handy Cartesian plane all the time).
The poster hangers are about the only method I know to hang posters in a room with cinderblock construction. Colleagues of mine swear by the glue gun but regret it in May when taking things down. These suckers work.
Honorable Mentions
as 
as @approx_normal 
as 
The Participants
@k8nowak  as @mr_stadel  |
@marybourassa  as @approx_normal |
@dandersod  as @Mythagon  |
@algebrainiac1  as @wahedahbug  |
@absvalteaching as @approx_normal  |
@mr_stadel  as @mr_vaudrey  |
@maxmathforum  as @MrHonner  |
@calcdave  as @bowmanimal  |
@cheesemonkeysf  as @mpershan  |
@mgolding  as @mrpicc112  |
@druinok  as @samjshah  |
@jacehan  as @park_star |
@hfxmark  as @ddmeyer |
@fourkatie  as @cheesemonkeysf |
@samjshah  as @druinok  |
@fouss  as @druinok  |
@lmhenry9 as @mathbratt |
@rdkpickle  as @j_lanier  |
@pamjwilson  as @mgolding  |
@mathbratt as @mathtastrophe |
@chris_harrow  as @roughlynormal |
@btwnthenumbers as @woutgeo  |
@park_star  as @crstn85  |
@zidaya  as @MrHonner |
