There are many sources of excellent notes online.
Craig Barton has written very clear notes for students (11-16) on his site mr barton math.com
The BBC Bitesize sites are very popular, see BBC Bitesize KS1 (ages 5-7), BBC Bitesize KS2 (ages 7-11), BBC Bitesize KS3 (ages 11-14) and BBC GCSE Bitesize (ages 14 – 16)
The Centre for Innovation in Mathematics Teaching have online textbooks / notes available for students age 5 to 18!
For example see Year 7 (scroll down to see the chapter headings for books 7A and 7B.
Scrolling down this page you will see the range of resources available including GCSE and A Level Notes. The interactive materials for Years 7, 8 and 9 are useful for self study. Students starting Advanced level courses (age 16-18) may find the transition materials useful.
For older students AJ Hobson’s ‘Just the Maths’ is very useful as is the excellent Math Centre site. See also the free courses availabe from The Open University and MIT .
See this Evernote shared notebook: Mathematics notes for many more useful links. Several universities have created very helpful Mathematics support which they have made available to all students. (You do not need an Evernote account to view the notebook).
Alternatively use the Livebinders version of the notes links.
