Ionic Compounds
Metal Structures
Simple Covalent Molecules
Giant Covalent Structures
Mass Calculations
% Mass Calculations
Acids & Alkalis
Details of the GCSE course offered by AQA can be found here:
http://www.aqa.org.uk/subjects/science/gcse/chemistry-8462
If you are unsure what exam board you are following just ask a science teacher at your school.