50% off storewide closeout sale!

This is a going-out-of-business sale. This was started as a family business, and since my divorce several years ago, my heart hasn't been in it. So I'm moving on.

Everything is 50% off, while it lasts! The discount happens as soon as you put something in your cart.

Several designs are completely sold out and no longer available, and most shirts have sold out in one or more sizes.

Click here to see shirts listed by sizes that are still available.

Click here for for Women's shirts sorted by available sizes.

Click here for for Youth shirts sorted by available sizes.

Orders over $200 get a 15 percent discount and free USA shipping; orders over $400 get a 20 percent discount and free USA shipping.

Adult Small

Products

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Just du It Calculus T-shirt (Sm, Med, 4XL)
Adult Small, Medium, 4XL.

Just Integral du It -- for those who make integral calculus too complicated. T-shirt is Black. Pricing: $20.

Dare to be Differential T-shirt

Front: Know Limits
Back: Dare to be Differential

Available in Stone Blue, Ash Gray, White, and Yellow.

Price: $20.

Physics Formula T-shirt (Small only)
Size Small only.

Features physics formulae from algebra-based physics, printed upside down so you can read the shirt easily while you wear it. Available in Black or Ash Gray.

Pricing: $20.

Question Everything T-shirt (Small only)
Printed on Front and Back. Sizes Small, Medium only.

Front upper left chest: "Know Math"
Back: "Question Everything. Fear nothing but ignorance. Know Math."
Shirt is Ash Gray. Available only in Small.

Pricing: $20.

Science is Awesome T-shirt

Dinosaurs, tornadoes, DNA double helix, and more. . . How could science not be awesome?
T-shirt is Navy Blue.

Price: $20.

SCIENCE! T-shirt
Comes in Adult and Youth sizes.

"SCIENCE!" spelled out using the shapes of various science-related items.

Price: $20.

Cogito Ergo Sum T-shirt (Small only)
Size Small only.
Printed on Front and Back

Available only in size Adult Small.
The Cogito Ergo Sum t-shirt features Rodin's Thinker.
Front: Rodin's thinker with the phrase Cogito, ergo sum.
Back: I think, therefore I add.
T-shirt is black. $19.

Eat No Sleep Caffeine Molecule T-shirt
Sizes Adult Small, Adult Medium, Adult Large.

Pricing: $20..

Human Genome Project T-shirt (Small Only)

Human Genome Project t-shirt closes in from human body, to cell, to a chromosome, to a strand of DNA.
T-shirt is White. Size Small only. $20.

Intelligent Design T-shirt (Small Only)

"Funny, you don't look intelligently designed!"
T-shirt is Camel Brown. Size Small only.

Pricing: $20.