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• Explore a couple modules in topics you have confidence to guage the depth of each lesson.
• Should you find out you have gaps in your knowledge, we recommend starting from the first module of each topic (Algebra, Combinatorics, and Number Theory).
• If you find that you know most or all of the content in the lesson, feel to free to skip around and pick out modules covering topics you have never heard of or head over to the practice problems at the end of General.

• Modules do not go over the proofs of formulas/theorems.
• There are many different ways of solving a problem shown in a module (we aim to show the solutions related to the module's content, so sometimes it might not be the most ideal solution)