My A Level Physics Notes cover the subject content of a UK syllabus I've taught a number of times.
They include those parts of GCSE Physics that are required, rather than assume they are known (they are not simply brief revision notes).
They are somewhat longer than the notes I've provided students with in class, but (deliberately) not as long as typical textbooks.
They are about 400 sides of A4 if printed out in the webpage format that I wrote them.
The notes are intended to be of use to both students and teachers.
Note - Ages of UK A Level students are typically equivalent to 11th/12th grade in USA.