Creators Brian Robbins and Dan Schneider both starred on ABC's Head of the Class (1986).
Lori Beth Denberg:
When the going gets tough, the tough get going. When left in the sun, mayonnaise grows hair.
When the TRP logo appears, Kel can be heard saying "Hey Clavis! Wake up! The show ain't over! Oh yeah, kick it!".
More recent airings of the show omit the musical guest performances, likely due to legalities.