Not too sure about Chemistry.
Brain is great for English though.
I've heard great things about Chemistry at Dr. Du (Hurstville).
Apparently, SIGI Learners (Hurstville) is quite good for Chemistry as well.
Good thing about Brain is that they offer private classes for Chemistry + all other subjects (although, at a higher price compared to normal sized classes) and that might be more helpful. And like most of the Brain tutors are qualified and know what they're doing so you should be in good hands.
