Season 1 Multiplication Rock ABC , 1973 Watch now Season 2 Grammar Rock ABC , 1973 - 1993 Watch now Season 3 America Rock ABC , 1975 - 2008 Watch now Season 4 Science Rock ABC , 1978 - 1979 Watch now Season 5 Computer Rock ABC , 1982 - 1984 Watch now Season 6 Money Rock ABC , 1994 - 1996 Watch now Season 7 Earth Rock ABC , 2009 Watch now