I have uploaded a new set of notes for the N level Chemistry and O level Chemistry combined science to my website at the Downloads section. A master equation mind map is also provided for the entire subject.
You may download them and distribute them if you wish. Do read up on the conditions for download on that page itself. These are summary notes that you can print out in booklet form for ease of learning. They are separated into chapters for ease of revision.
These notes have a version number attached to it. Usually in the format, MONTH/YEAR. You should check back frequently to see if you have the latest one.