[5] The Curiosity Shop version is an extended cut which includes an additional scene/verse of 15 seconds in length that explains the pattern of each set of ten containing three multiples of three, animated in the form of a carnival shooting game.

[7] During the early 1970s, Schoolhouse Rock was one of several short-form animated educational shorts that aired on ABC's children's lineup; others included Time for Timer and The Bod Squad.

The first video of this season, "A Victim of Gravity," parodied elements of the hit film Grease and featured a rare guest appearance from a pop band, with recently reunited doo-wop group the Tokens providing the vocals.

In addition to episodes describing the human body's anatomical systems (the nervous, circulatory, skeletal and digestive systems each received a music video), episodes describing physical sciences such as astronomy, meteorology and electricity were also included, as was "The Energy Blues," an environmentalism-themed video.

As the references and depictions became quickly outdated, due to the rapid advance of technology, these segments stopped airing after 1985 and were not released on home video until the 30th anniversary DVD in 2002.

After leaving the airwaves in 1985, the original team reunited to produce two more Grammar Rock segments ("Busy Prepositions" and "The Tale of Mr. Morton") for television in 1993 with J. J. Sedelmaier Productions, Inc.[8] This was followed in 1995 by a new series, "Money Rock," which discussed themes related to money management on both the personal and governmental scale.

The series as a whole (after 27 years, shortly before the show's 30th anniversary) ceased airing on television in 2000, with newer episodes being released directly to home video.

Starting in 2002, the team once again reunited to produce a new song, "I'm Gonna Send Your Vote to College," written by George Newall and performed by Bob Dorough and Jack Sheldon for the 30th Anniversary VHS and DVD releases.

[9] Another contemporary song, called "Presidential Minute," also written by George Newall, which explained the process of electing the President of the United States in greater detail, was included on the 2008 DVD Schoolhouse Rock!

In 2009, in response to the threat of climate change, a new series of shorts was released directly to DVD, with the title Schoolhouse Rock!

[10] Animations were created by members of the original production team, and 11 environmentally themed songs were written and performed by a combination of veterans of the original series (including Bob Dorough, Jack Sheldon, and Lynn Ahrens) and newcomers such as composer George Stiles and performers Tituss Burgess, Barrett Foa, and Shoshana Bean, all of whom were veterans of Broadway theatre.

In a first for the series, an additional 12th song, "The 3 R's," a reworked version of "Three Is a Magic Number" rethemed around the message "reduce, reuse, recycle," was included as a live action music video (starring singer Mitchel Musso) rather than as a new cartoon.

Also unique to this iteration of the series was the inclusion of interstitial introductions featuring recurring animated characters created for the DVD, Jack, Bob, and Lou, a trio of Arctic polar bears.

On January 6, 2013, George Newall and Bob Dorough appeared at the Kennedy Center in Washington, D.C., as part of their ongoing series of free concerts on the Millennium Stage.

Dorough played five songs, accompanying himself on the piano: "Three Is a Magic Number," "Figure Eight," "Conjunction Junction," "Preamble," and "I'm Just a Bill."

A 1987 production of the series for VHS tapes released by Golden Book Video featured Cloris Leachman opening the collection and some songs with child dancers and singers.

In 1994, ABC/King Features sold exclusive licensing rights for apparel to Coastal Concepts, Inc. of Vista California, the first company to produce Schoolhouse Rock!

Tom Yohe worked with contemporary artist Skya Nelson to create over 50 new designs and update the Schoolhouse Rock!

The set features 52 of the 53 episodes that had been produced up to that point, including three of the lost "Computer Rock" segments, with the exception of "Introduction."

"The Weather Show" and "Presidential Minute" are found on the bonus disc, the former in modified form with the problematic lyric removed, and the latter viewable only upon completing the "Earn Your Diploma" Trivia Game.

An abbreviated VHS, featuring 25 episodes (ranked on the tape in order of popularity) and "I'm Gonna Send Your Vote to College," was released at the same time.

Covers by notable artists included "Three is a Magic Number" by Blind Melon, "No More Kings" by Pavement, "The Shot Heard 'Round the World" by Ween, "My Hero, Zero" by The Lemonheads and "Verb: That's What's Happening" by Moby.

Several well-known artists contributed tracks to the album, including Isaac Hayes, Joan Osborne, The Sugarhill Gang and The Roots, alongside original Schoolhouse Rock!

It featured a collaboration between artists Scott Ferguson, Kyle Hall, George Keating, Lynn Ahrens, Bob Dorough, Dave Frishberg, and Kathy Mandry, utilizing some of the most famous songs of Newall and Yohe.