So your basically saying that because science courses are deemed more difficult (hence higher scaling) it should not be allowed an extension?
In that case, we should cancel the math and english extensions cause there 2 unit subjects have high scaling and introduce 4 unit dance and Hospo so we can cater to the minority...
Extension science:
The students must learn two option topics from either the chemistry, physics, biology or earth syllabus. The chosen options must not be the options learnt in the 2 unit course and must be from two different subjects, ie you may not choose 2 chem electives.
In order two persue an option topic, the student must be doing the 2 unit course. This therefore restricts the subject to those doing at least 4 units of science (excluding senior).
In addition, the student will endeavor on a major work, going throgh the stages of scientific investigation in greater detail then the junior course. There chosen topic must be relevant to the hsc courses they are enrolled in and of an advanced level.
I'll give you "throgh" as a typo but it's very hard to take you seriously when, although attempting to articulate your points with a degree of sophistication, you still have worse english than a primary school student.