Turning fifty this month with its debut as a series with Multiplication Rock with songs written and performed by Bob Dorough going through the tables—see also—the interstitial animated educational shorts Schoolhouse Rock! was a staple of American Saturday morning cartoon programming, originally running through 1984. The original concept was suggested by an advertising executive of the influential firm McCaffrey and McCall’s that his young son was—despite being able to memorise the lyrics of Rolling Stones songs—struggling to rote lessons, resulting in the pre-canon “Three is a Magic Number” in 1971 before pursuing the project further. One of three between programming segments along with Time for Timer (“A Hankering for a Hunk of Cheese”) and the Bod Squad (“The Munchies,” “Don’t Drown Your Food”) and was followed by a second series, Grammar Rock, and for the US bicentennial in 1976, America Rock, culminating in the final run of Scooter Computer and Mister Chips.