Mushroom_head: i reckon u shud go at your own pace...for me it was like i was nearly done with the second module when my teacher started it in class. He didn't teach us how to do Extended responses nor he went thru em...i mean he never explained em. He only used to explain just a bit of the concept...which was not that of use since the syllabus has heaps of extended responses n stuff...
so I'd recommend...that get your hands on books like Conq Chem, Pathways, Chem in Context, Surfing books and any other study guides. Make notes out of the three text books(conq chem, Pathways, Chem in context) and then take the syllabus...write each dot point down as a QUESTION...and answer it looking at your notes...this way by the time Trials/HSC comes around..u'd have your notes ready..and u'd just need to these Answers to the dot points...and also...use study guides to add more info to your answers to make em to the point. Extensive Knowledge is also another thing, which u may gain from the Study Guides.
If u find class time as a "waste of time" then take your notes that u make at home or your Dot points + Answers to class....and read thru em in class....like i did.
Also...read through your notes every couple of days..so by the time u have trials and HSC u'd really have them in your mind....well thats my experience.
And yeah...Get a tutor.