January 6, 1973: Maybe the debut of Schoolhouse Rock! is not the height of media history, but it’s a fun point. Since ABC debuted the Saturday morning series 38 years ago today, kids have been learning math, science, grammar and more through catchy songs paired with eye-popping cartoons. In 2009, the Schoolhouse Rock! crew came out with an environment-themed series called “Schoolhouse Rock!: Earth.” Like Sesame Street before it, the show continued to push the trend in edu-tainment–a powerful, profitable genre which persists to this day.