Math Mammoth Thanksgiving Sale

Math Mammoth Thanksgiving sale is already in full swing... You'll get 20% off of all the downloads and CDs sold at Kagi store.

To take advantage of this offer, enter the coupon code THANK2010 at checkout.

Enter the coupon code on the shopping cart page (not the first order page). Coupon valid till November 29, 2010, only at Kagi store. Not applicable to printed copies.

Order pages:

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Conversion chart for measuring units

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Meaning of factors in multiplication: four groups of 2, or 4 taken two times?

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