From 1965 or 1966 Jared Kass and fellow Amherst students Bob Fein, Richard Jacobson, Robert Marblestone, Steve Ward, Fred Hoxie, Gordon Murray, and others evolved a team frisbee game based on concepts from American football, basketball, and soccer. This game had some of the basics of modern ultimate including scoring by passing over a goal line, advancing the disc by passing, no travelling with the disc, and turnovers on interception or incomplete pass. Kass, an instructor and dorm advisor, taught this game to high school student Joel Silver during the summer of 1967 or 1968 at Northfield Mount Hermon School summer camp.