Square One Television (sometimes referred to as Square One or Square One TV) is an American children's television program produced by the Children's Television Workshop (now known as Sesame Workshop) to teach mathematics and abstract mathematical concepts to young viewers. Created and broadcast by PBS in the United States from January 26, 1987 to October 18, 1991, the show was intended to address the math crisis among American schoolchildren. After the last episode aired, the show went into reruns until October 7, 1994. The show was revived for the 1995–1996 PBS season as a teacher instruction program, Square One TV Math Talk. From 1999 to 2002, Square One was also shown on Noggin, a cable channel co-founded by Sesame Workshop and Nickelodeon. Format Sketches Square One comprised short sketches that introduced and applied concepts in mathematics such as counting, combinatorics, simple fractions, estimation, probability, and geometry. The sketches featured regular characters and were mainly parodies of pop culture icons, popular television commercials or popular television shows. Sketches were presented in various formats, including music videos featuring a particular subject in mathematics and taught the subject through song (e.g., Roman numerals, obtuse and acute angles, percentages, negative numbers, etc.) or comedic sketches (e.g., General Mathpital, a parody of General Hospital; Nobody's Inn, a parody of Fawlty Towers; Late Afternoon with David Numberman, a parody of Late Night with David Letterman, I Love Lupy, a parody of I Love Lucy, The Phoneymooners, a parody of The Honeymooners; etc.). "Patterns", a polka about patterns that can be detected in daily life, was performed by "Weird Al" Yankovic. Since Yankovic did not write this song, it is unavailable on any of his records, though bootleg versions have circulated. The Judds appeared on Square One Television many times, as they performed various songs. Mathcourt was a regular segment that parodied television shows of the day set in courtrooms, presided by Judge Sandra Day O'Crater (played by Cynthia Darlow), who showed zero tolerance for unacceptable behavior from the audiences (and the announcer, with the judge sometimes not knowing who it was), frequently telling the gallery she'd have them do time or punish them in another extreme way if they didn't shut up and stop the interruptions (she even threatened to have them all hanged on one occasion). In all cases, a district attorney was suing a defendant for a math crime the defendant did not commit.