orc gce maths pastpapers with solutions
maths
chemistry
physics other subjects explore yourself
Math Olympics papers with solutions
Math Olympics papers sample
ncert textbooksclass Xll maths chapter 9 differential equation, I use it for reference.
University of Cambridge Faculty of Mathematics lecture notes
trigonometry Michael Corral
vector calculus Michael Corral
Math Documents of Gilles Cazelais
sample: Solving Recurrence Relations
Paul's Online Math Notes
I tried to email the author about the content.