How the No. 2 pencil became a uniquely American school supply staple

For generations, a sharpened No. 2 pencil has symbolized childhood and maturation in American culture. Still a common sight on back-to-school lists, it marks a child's first letters, corrects errors, and allows for doodling in margins when minds wander. The No. 2 pencil's origins lie with American innovation. Prior to the mid-1800s, American pencils lacked erasers, a feature later added by John Thoreau, Henry David Thoreau's father.

Thoreau, a renowned writer, pioneered the four-grade system for pencils, with No. 2 providing a balance of graphite and clay for optimal writing. Today, although pencils are less prevalent due to the rise of digital testing, they remain a symbol of democracy and are often required for handwritten exams to prevent cheating.