If you’re in back-to-school shopping mode, now’s the time to stock up on mental_floss t-shirts, books and games. (Bananagrams is on your back-to-school shopping list, right?)

This week, everything in our store is 15% off (except subscriptions and package deals). Just visit our store, fill up your cart, and enter the coupon code “schooldays” before checkout.

But don’t wait too long—the sale ends at 11:59pm Eastern Time on Friday. And if you have a picture of yourself sporting a mental_floss shirt, email us—flossyjason@gmail.com. Perhaps you’ll show up in the magazine, here on the blog, or on our Facebook page.