New Gear!

I told myself no more black t-shirts.  Absolutely none.  And, well...I found two new math t-shirts that I just couldn't refuse, black and all.

This now brings my math t-shirts to 6, or in math terms, an even half dozen.  My husband thinks that's too many.  After all, he says, there are only 5 days in a school week.  I'm not quite nerdy enough to wear them on a non-school day, so they really only do get used for school.  What do you think?  How many is too many?  And if you don't think I have enough, share your favorite place to get math-wear!