Each exam board is different and you need revision notes tailored to your needs. I've spent a lot of time going over the exams and I think I know what the examiners think is important, what the mark-schemes are, the techniques that will help you improve your grade.
These include Maths and Calculator Skills for Science Students covering all those tiny bits that A* students are expected to know but are really more maths then science.
Maths (The Chemistry Bits) for Core and Additional Science, available in higher and foundation versions and covering all the mathsy topics you'll need for your GCSE, with answers at the back. The foundation version is aimed at C grade students, in the higher version each section starts with simple questions that B grade students should be able to cope with, and ends with questions that will challenge A* students.
Maths (The Chemistry Bits) for Triple Science is also available (higher and foundation) and has three extra sections needed for triple science.
Scroll down to either Chemistry or Physics and you'll find links to the page on here with all the details and to the YouTube Playlist.
The best way to revise
Is by using the past papers from the exam boards and marking them your self.
|C1.1 Elements, Compounds and Mixtures||YouTube Playlist|
|C1.2 Atomic Structure||YouTube Playlist|
|C1.3 Bonding||YouTube Playlist|
|C1.4 Structures||YouTube Playlist|
|C1.5 Equations||YouTube Playlist|
|C1.6 Periodic Table||YouTube Playlist|
|C1.7 Quantitative Chemistry||YouTube Playlist|
|C1.8 Acids, Bases and Salts||YouTube Playlist|
|C1.9 Tests for Ions||YouTube Playlist|
|C1.10 Solubility||YouTube Playlist|
|C2.1 Reactivity Series of Metals||YouTube Playlist|
|C2.2 Water||YouTube Playlist|
|C2.3 Different Types of Chemical Reactions||YouTube Playlist|
|C2.4 Rates of Reaction||YouTube Playlist|
|C2.5 Non-Metals and Their Compounds||YouTube Playlist|
|C2.6 Organic Chemistry||YouTube Playlist|
|C2.7 Quantitative Chemistry||YouTube Playlist|
|C2.8 Materials||YouTube Playlist|
|P1.1 Force and Motion||YouTube Playlist|
|P1.2 Energy||YouTube Playlist|
|P1.3 Moments||YouTube Playlist|
|P1.4 Radioactivity||YouTube Playlist|
|P2.1 Waves, Sound and Light||YouTube Playlist|
|P2.2 Electricity||YouTube Playlist|
|P2.3 The Earth and Universe||YouTube Playlist|