Arithmetic YA_Gift_Guide —in this companion to the

—in this companion to the #1 New York Times bestselling We Don't Eat Our Classmates by Ryan T

and with a deep tradition of resistance to interference by people “from away

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The famed foreign correspondent and historian William L

Arithmetic YA_Gift_Guide —in this companion to theInspiring and informativedeserves to be widely read. Wall Street Journal This fun book offers a philosophical take on number systems and revels in the beauty of math. Science News Because we have ten fingers, grouping by ten seems natural, but twelve would be better for divisibility, and eight is well suited to repeated halving. Grouping by two, as in binary code, has turned out to have its own remarkable advantages. Paul Lockhart presents arithmetic