I produce these stickers and t-shirts, and have distributed over 20,000 stickers in the last four years!  Stickers are always available via eBay (or find me at a conference).  Shirts are for sale three times a year.

All t-shirts and onesies are $20.

Profits from the shirts ($1-$4 per shirt) are sent directly to TODOS, Mathematics for all, which is a professional organization that advocates for equity and excellence in mathematics education for ALL students – in particular, Latina/o students.

Store open October 1-13!