Hey guys does anyone know any good Maths software (revision) to help me boost my grade up I really struggle with maths! I also need a book which tells you how to do calculations everything, anyone got any recommendations? (links would be nice).

I did see one software on Amazon it was like 400 lol, so need to keep this on a budget around 20-30 and same budget for the book.

Cheers
Mathsworld