Everything about how this course runs: the shape of a unit, what to bring, how marks are put together, how to get help, and the safety agreement that has to be signed before you can do any lab work.
Read Safety in the Lab first. It is the only page here with a deadline attached to it — no signature, no lab.
Then How Chemistry Class Works, which explains why the investigations come before the explanations, and what changes now that the course is only chemistry.