Dear Alex and Iam2,
Thanks for your advice. This is specifically for Iam2. I am not actually looking for too much information. But I just want to fully absorb the materials in textbooks and lecture notes. However, the books and notes are usually filled with important points without detailed explanations. In order to comprehend it better, I can't just read it.
I am sure you have such experience, that if you want to comprehend a book very well, no matter how hard you stick to that book, you can't comprehend it fully.
You need another book of the same or relevant topic. Sometimes even the topics are just a little bit relevant or irrelevant, but they stimulate your brain
to think. Like, a scientist come up with a great idea by just looking a child playing or some other completely irrelevant stuffs. I am looking for some stimulator.
Though I do a basic probability course. I photoread stochastic process and books with 1000 exercises so as to store different information in brain and see if they will server as stimulators.
By the way, I am doing Linear Algebra, Sets & Groups Theory, (real numbers, sequence, series continuity, differentiability, integrals) of Real Analysis, Basic Calculus, Calculus of 2 more more variables, Calculus in 3D, Mechanics, Geometry, Complex Geometry, Introductory Probability (partition, pgf, random walk, gambler ruin's problesm, distributions, bla bla bla) and introductory statistics. In UK, we don't sit for individual paper of each course. We will sit in 4 papers with 2-4 courses in 1 paper.