| 3166 | Oakhill College | Castle Hill | Economics | 3 |
| 3167 | Oakhill College | Castle Hill | Geography | 3 |
| 3168 | Oakhill College | Castle Hill | Industrial Technology | 3 |
| 3169 | Oakhill College | Castle Hill | Mathematics Extension 2 | 3 |
| 3170 | OneSchool Global NSW Armidale | Armidale | Food Technology | 3 |
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| 3171 | OneSchool Global NSW Illawarra | Maddens Plains | Food Technology | 3 |
| 3172 | OneSchool Global NSW Illawarra | Maddens Plains | Mathematics Standard 2 | 3 |
| 3173 | OneSchool Global NSW Mount Victoria | Mount Victoria | Mathematics Standard 2 | 3 |
| 3174 | OneSchool Global NSW Sydney | Oatlands | Mathematics Standard 2 | 3 |
| 3175 | Oran Park Anglican College | Oran Park | Business Studies | 3 |
| 3176 | Oran Park Anglican College | Oran Park | English Advanced | 3 |
| 3177 | Oran Park Anglican College | Oran Park | Legal Studies | 3 |
| 3178 | Orange High School | Orange | Community and Family Studies | 3 |
| 3179 | Our Lady of Mercy College Parramatta | Parramatta | English Extension 1 | 3 |
| 3180 | Our Lady of Mercy College Parramatta | Parramatta | History Extension | 3 |
| 3181 | Our Lady of Mercy College Parramatta | Parramatta | Japanese Extension | 3 |
| 3182 | Our Lady of Mercy College Parramatta | Parramatta | Society and Culture | 3 |
| 3183 | Our Lady of the Sacred Heart College | Kensington | Legal Studies | 3 |
| 3184 | Our Lady of the Sacred Heart College | Kensington | Mathematics Advanced | 3 |
| 3185 | Our Lady of the Sacred Heart College | Kensington | Mathematics Extension 1 | 3 |
| 3186 | Our Lady of the Sacred Heart College | Kensington | Modern History | 3 |
| 3187 | Oxford Falls Grammar School | Oxford Falls | Economics | 3 |
| 3188 | Oxford Falls Grammar School | Oxford Falls | Mathematics Extension 1 | 3 |
| 3189 | Oxley College | Burradoo | Earth and Environmental Science | 3 |
| 3190 | Oxley College | Burradoo | Modern History | 3 |
Source: NSW Education Standards Authority (NESA).
Supplementary data from school publications.
Supplementary data from school publications.
Last Updated: 6 Sep 2023