Bob Dorough was writing jingles for a New York ad agency in the 1970s when the company's president approached him for a special project.
The man's son was having a difficult time learning his multiplication tables, but the father noticed the boy knew all the words to his Beatles songs. The president asked Dorough to write rock songs that reviewed his son's math lessons.
Dorough, now of Upper Mount Bethel Township, was an accomplished jazz pianist, but he gave educational music a shot. The result was "Schoolhouse Rock!," the series of educational shorts that have taught generations of school children about math, science and history.