By age 16, “being on some occasion made ashamed of my ignorance in figures, which I had twice failed in learning when at school,” Benjamin Franklin wrote, “I took Cocker’s book of arithmetic and went through the whole by myself with great ease.”

After Failing Math Twice, a Young Benjamin Franklin Turned to This Popular 17th-Century Textbook

A 19th-century scholar claimed that "Cocker's Arithmetick" had "probably made as much stir and noise in the English world as any [book]—next to the Bible"

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