largerThree days a week, Madeline Scotto walks across the street from her home to St. Ephrem’s elementary school, where she was part of the first graduating class. She climbs the stairs to her classroom, where she works to prepare students for the math bee. She pores over photocopied worksheets with complicated problems, coaching kids on how to stay calm on stage while multiplying and dividing in their head.  She’s just like any other teacher at the school—except for one thing: She’s 100 years old.