William Penn Charter School (commonly known as Penn Charter or simply PC) is an independent school in Philadelphia, Pennsylvania, founded in 1689 at the urging of William Penn as the "Public Grammar School" and chartered in 1698 to be operated by the "Overseers of the public School, founded by Charter in the town & County of Philadelphia" in Pennsylvania. It is the oldest Quaker school in the world, the oldest elementary school in Pennsylvania, and the fifth oldest elementary school in the United States following The Collegiate School (1628), Boston Latin School (1635), Hartford Public High School (1638), and Roxbury Latin (1645). Today, Penn Charter enrolls boys and girls in pre-kindergarten through 12th grade. It is considered to be an exclusive private school in terms of admission criteria and is ranked among the top schools in the Philadelphia area. According to Worth Magazine, Penn Charter ranks within the nation's top 100 private and public schools that send the most students to Harvard, Princeton and Yale.