I will be attempting to self-study mathematics and I need some advice. I made a D in Calculus II this past semester. I will be retaking it along with Diff Equations and Mathematical statistics. I will also be sitting in Calculus I class with an instructor, although I don't need to take it since I made a B in the course. I just want to be refreshed in the material. This semester I am taking Fundementals of Mathematics and the book we use is "Doing Mathematics: an introduction to proofs and problem-solving". The book that is utilized in the calculus series(I-III) at my university is Anton Bivens Davis Calculus. So far I have Spivak Calculus, Courant Calculus, Apostol and Piskunov as well as several Analysis Books. I need to brush up on my Algebra and Trig so I have I.M. Gelfand's Algebra and Trigonometry. I also ordered "Fundementals of Freshman Mathematics" by Allendoerfer I was going to start with my Algebra and Trig then brush up on my proofing techniques, which is a little difficult and new to me since this Fundamentals of math class is my first encounter with it, and then start with Spivak and go from there. I will be graduating Spring '14 with a double major in Mathematics and Biology, but I don't think I'm as good at mathematics as I should be. Any advice?