By Cory Turner
nprED
“Sarah Hagan has a passion for math, and the pi-shaped pendant to prove it.
The 25-year-old teaches at Drumright High School in Drumright, Okla. The faded oil town is easy to miss. Fewer than 3,000 people live there, and the highway humps right around it.
There are no stoplights, no movie theater and no bowling alley anymore. Just a clutch of small houses and hearty businesses: a funeral home, Family Dollar and a Dollar General.”