21 | Knox Grammar School | Wahroonga | Music Extension | 7 |
22 | Knox Grammar School | Wahroonga | Biology | 6 |
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23 | Knox Grammar School | Wahroonga | Software Design and Development | 5 |
24 | Knox Grammar School | Wahroonga | French Continuers | 3 |
25 | Knox Grammar School | Wahroonga | German Continuers | 3 |
26 | Knox Grammar School | Wahroonga | History Extension | 3 |
27 | Knox Grammar School | Wahroonga | Agriculture | 2 |
28 | Knox Grammar School | Wahroonga | Engineering Studies | 2 |
29 | Knox Grammar School | Wahroonga | English Extension 2 | 2 |
30 | Knox Grammar School | Wahroonga | Information Processes and Technology | 2 |