I am an accounting university student. I achieved an A* in Mathematics Higher Tier IGCSE. I did 3H and 4H Higher Tier Mathematics. Those who are doing the same modules can learn it here. Hope you find it invaluable.
You might wonder how I would explain it to you. I'll use my simplest word vocabulary to explain the subject on the thread and attach pictures which you could follow as in to understand. Still if you find it hard, ask me the doubt and I will explain it.
Not much use to students them if its a resource for teachers. Seems spammy to me.
Thanks for the information. Actually I thought that link would be helpful but, as you've looked through and found it's no use to students I shall delete that.
And these links which you've quoted me in are for students if you look into it.