I cannot provide thoughts on Software Design and Development since I did not take this subject. You should definitely refer to the above post for thoughts on SDD. However, I will also provide my thoughts on Information Processes and Technology as well as some of your other subjects:
1. While the focus of the HSC exam will be on assessing your knowledge of the topics from the IPT HSC course (that is, the main and option topics), concepts that you learned as part of the Preliminary course can still be assessed. Examples of such concepts include:
- Social and ethical issues
- Information processes
- Software and hardware
Some questions may incorporate multiple elements originating from the Preliminary course. Consider Question 28(e) from the 2021 IPT HSC exam:
"A multimedia system is to be developed which will allow users to upload television and radio programs, podcasts, movies and music to share with other users.
Analyse this multimedia system in terms of technical and ethical issues and the information process of storing and retrieving."
On the other hand, calculations and conversions that you might have studied in year 11 (such as decimal to binary) are not assessed as part of the HSC course and were not included in the HSC exam I sat back when I did my HSC (or any other HSC exam paper for that matter).
Overall, while the focus of the HSC exam will mostly be on the HSC topics, it would be a good idea to ensure that you remain familiar with some of the basic concepts taught in the Preliminary course.
2. The Samuel Davis textbook provides in-depth explanations of concepts, which can be useful if there is a particular concept(s) that you may not fully understand and wish to get clarification on. With that being said, it is not an essential part of effectively studying for IPT (although it can be useful, depending on your own needs). I personally never used the textbook and instead relied on my own notes as well as those that my teacher provided my class with. I ended up with an HSC mark in the band 6 range.
3. It would be a good idea to regularly go through the topics that you have covered so that you remember all important concepts and maintain the ability to seek clarification with any concept/topic that you may not fully understand in time. The more you do this, the less demanding IPT will become. Closer to the HSC exam period is when you can and should attempt past HSC exam papers. By then, you will have covered all topics and would thus be able to apply your knowledge to actual exam questions, allowing you to determine and address any areas of improvement in a timely manner. This also applies to your trial exam, as it can give you an indication of what the HSC exam will be like.
4. Effective preparation for Mathematics Advanced involves completing practice material (including textbook questions and past papers). The more you do this, the more you will be able to apply your knowledge to exam questions, allowing you to recognise patterns more effectively, as well as determine any areas of improvement, which you can subsequently work on addressing, such as by seeking assistance from your teacher and completing supplementary questions targeting the specific concept(s) that you may need to work on.
In terms of English Standard, it is important to ensure that you are aware of the themes/ideas/issues raised by each module and the manner in which such themes/ideas/issues are conveyed within your prescribed texts for each module. Doing so involves gaining a thorough understanding of each of your prescribed texts, including specific quotes and techniques that you believe are significant and through which you can establish links between those texts and the respective modules, ultimately allowing you to effectively respond to essay questions with high-quality responses.
Focusing on essay writing would involve attempting a number of practice essay questions (or questions that specify a particular type of writing, such as Module C questions) that fall under each module. You can then seek feedback from your teacher regarding your writing. This will enable you to identify areas of improvement and, if needed, implement any suggestions that your teacher may have, which would in turn allow you to gradually improve the quality of your writing.
I hope this helps!