Cole Hershman’s high school calculus teacher introduced “L'Hôpital's rule” by showing it featured in the movie “Mean Girls.” She pushed him and his classmates to take the hardest course they could before college to challenge themselves, and she was reliably in her classroom smiling whenever they needed advice.
Even now, as Hershman prepares to graduate from the University of Maryland as one of its top students, her adaptation of a Jiminy Cricket song title, “Always Let Your Conscience Be Your Guide,” is still floating around in his head.
