KDC I used the Jacaranda Science Quest yr 10 book and a year 9 science textbook I found online - no you don't have to memorise the whole periodic table, but if you wanna be safe the first 20 or so is more than enough. Tuition wasn't needed for the test as the interview is where the challenge really is. Self-study is essential in this year's case, but (imo) you should put more importance to the interview as opposed to the test, as this year at least, it was not nearly as hard as the interview.
I'm just giving advice based on this year's admission process but I assume parts of the test would change (?) next year, correct me if I'm wrong though.
