| 1951 | Domremy College | Five Dock | Music 1 | 5 |
| 1952 | Domremy College | Five Dock | Personal Development, Health and Physical Education | 1 |
| 1953 | Domremy College | Five Dock | Society and Culture | 1 |
| 1954 | Domremy College | Five Dock | Studies of Religion I | 6 |
| 1955 | Doonside High School | Doonside | Ancient History | 1 |
| 1956 | Doonside High School | Doonside | English (Standard) | 4 |
| 1957 | Doonside High School | Doonside | Legal Studies | 1 |
| 1958 | Dorrigo High School | Dorrigo | English (Advanced) | 1 |
| 1959 | Dubbo Christian School | Dubbo | Software Design and Development | 1 |
| 1960 | Dubbo College Senior Campus | Dubbo | Biology | 1 |
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| 1961 | Dubbo College Senior Campus | Dubbo | Community and Family Studies | 1 |
| 1962 | Dubbo College Senior Campus | Dubbo | Dance | 1 |
| 1963 | Dubbo College Senior Campus | Dubbo | Human Services Examination | 1 |
| 1964 | Dubbo College Senior Campus | Dubbo | Legal Studies | 2 |
| 1965 | Dubbo College Senior Campus | Dubbo | Mathematics | 2 |
| 1966 | Dubbo College Senior Campus | Dubbo | Society and Culture | 1 |
| 1967 | Dubbo School of Distance Education | Dubbo | Agriculture | 1 |
| 1968 | Dubbo School of Distance Education | Dubbo | Biology | 1 |
| 1969 | Dubbo School of Distance Education | Dubbo | English (Advanced) | 1 |
| 1970 | Dulwich High School of Visual Arts and Design | Dulwich Hill | Design and Technology | 1 |
| 1971 | Dulwich High School of Visual Arts and Design | Dulwich Hill | English Extension 2 | 1 |
| 1972 | Dulwich High School of Visual Arts and Design | Dulwich Hill | Industrial Technology | 1 |
| 1973 | Dulwich High School of Visual Arts and Design | Dulwich Hill | Music 1 | 1 |
| 1974 | Dulwich High School of Visual Arts and Design | Dulwich Hill | Visual Arts | 1 |
| 1975 | Dunedoo Central School | Dunedoo | Agriculture | 1 |
| 1976 | Dungog High School | Dungog | Drama | 1 |
| 1977 | Dungog High School | Dungog | English Extension 1 | 2 |
| 1978 | Dungog High School | Dungog | Hospitality Examination | 1 |
| 1979 | Dungog High School | Dungog | Industrial Technology | 1 |
| 1980 | Dungog High School | Dungog | Legal Studies | 2 |
| 1981 | Dungog High School | Dungog | Mathematics General 2 | 1 |
| 1982 | Dungog High School | Dungog | Music 2 | 1 |
| 1983 | Duval High School | Armidale | Biology | 1 |
| 1984 | Duval High School | Armidale | Chemistry | 1 |
| 1985 | Duval High School | Armidale | Community and Family Studies | 1 |
| 1986 | Duval High School | Armidale | English (Advanced) | 2 |
| 1987 | Duval High School | Armidale | History Extension | 2 |
| 1988 | Duval High School | Armidale | Hospitality Examination | 1 |
| 1989 | Duval High School | Armidale | Industrial Technology | 1 |
| 1990 | Duval High School | Armidale | Mathematics | 1 |
| 1991 | Duval High School | Armidale | Mathematics Extension 1 | 1 |
| 1992 | Duval High School | Armidale | Mathematics Extension 2 | 1 |
| 1993 | Duval High School | Armidale | Mathematics General 2 | 1 |
| 1994 | Duval High School | Armidale | Music 2 | 1 |
| 1995 | Duval High School | Armidale | Music Extension | 1 |
| 1996 | Duval High School | Armidale | Physics | 1 |
| 1997 | East Hills Boys High School | Panania | Biology | 1 |
| 1998 | East Hills Boys High School | Panania | Business Studies | 1 |
| 1999 | East Hills Boys High School | Panania | Chemistry | 2 |
| 2000 | East Hills Boys High School | Panania | Engineering Studies | 2 |