| 1926 | Killara High School | Killara | Legal Studies | 5 |
| 1927 | Killara High School | Killara | Music 1 | 5 |
| 1928 | Killara High School | Killara | Society and Culture | 5 |
| 1929 | Killara High School | Killara | Visual Arts | 5 |
| 1930 | Killarney Heights High School | Killarney Heights | Ancient History | 5 |
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| 1931 | Kincoppal Rose Bay School of the Sacred Heart | Vaucluse | English Extension 2 | 5 |
| 1932 | Kincoppal Rose Bay School of the Sacred Heart | Vaucluse | Italian Beginners | 5 |
| 1933 | Kincumber High School | Kincumber | Legal Studies | 5 |
| 1934 | Kingsgrove High School | Kingsgrove | Mathematics Extension 1 | 5 |
| 1935 | Kinross Wolaroi School | Orange | Ancient History | 5 |
| 1936 | Kinross Wolaroi School | Orange | Industrial Technology | 5 |
| 1937 | Kinross Wolaroi School | Orange | Music 1 | 5 |
| 1938 | Kinross Wolaroi School | Orange | Studies of Religion I | 5 |
| 1939 | Kirrawee High School | Kirrawee | Legal Studies | 5 |
| 1940 | Knox Grammar School | Wahroonga | Geography | 5 |
| 1941 | Knox Grammar School | Wahroonga | Information Processes and Technology | 5 |
| 1942 | Korowal School | Hazelbrook | Visual Arts | 5 |
| 1943 | Lambton High School | Lambton | Mathematics Extension 1 | 5 |
| 1944 | Lisarow High School | Lisarow | Biology | 5 |
| 1945 | Loreto Kirribilli | Kirribilli | Biology | 5 |
| 1946 | Loreto Kirribilli | Kirribilli | Design and Technology | 5 |
| 1947 | Loreto Kirribilli | Kirribilli | English (Standard) | 5 |
| 1948 | Loreto Kirribilli | Kirribilli | French Continuers | 5 |
| 1949 | Loreto Normanhurst | Normanhurst | English Extension 1 | 5 |
| 1950 | Loreto Normanhurst | Normanhurst | History Extension | 5 |
Source: NSW Education Standards Authority (NESA).
Supplementary data from school publications.
Supplementary data from school publications.
Last Updated: 14 Feb 2023