Photographs illustrate the concept of pairs through such examples as two hands, two skates, and two twins.

Count and share with…underwear! Come along on a zany adventure with this Classic Board Book edition of One Big Pair of Underwear from New York Times bestselli

The world is filled with numbers. From learning to count their fingers to learning to put on their shoes, children encounter mathematical concepts early in life

'Life was a wordless battle of wits between us, with her keeping a sharp look-out for signs of neglect, and me trying to disguise my slovenliness by subterfuge.