Who writes these solutions
MathHub is a one-person site. Everything on it is written, checked and maintained by Daniel Park, a mathematics teacher based in Seoul, South Korea.
Why this site exists
I teach mathematics to two groups of students at once, and they rarely have anything in common on paper. One group is preparing for the Korean CSAT (수능) and school exams here in Seoul. The other group are Korean students living abroad — in six countries at the time of writing — who are sitting the SAT, AP Calculus, IB Mathematics, A-Level, IGCSE, or the admissions tests that UK universities set, such as the TMUA and the Oxford MAT.
Teaching both sides at once means I spend a lot of time doing something that should not be necessary: hunting for the same past paper across half a dozen unrelated sites, each with its own naming scheme, and then re-deriving a solution because the published mark scheme gives an answer without an argument. MathHub is where I put that work so it does not have to be repeated — an index of what exists, and worked solutions written the way I would explain them at a desk.
What is here, and what is not
Written by me: the topic chapters (Algebra 2, Precalculus, AP Calculus, IB Mathematics AA and AI), the worked examples inside them, and the exam guides. If a page explains something, a person wrote that explanation.
Not hosted here: the exam papers themselves. Copyright in a past paper belongs to the board that set it, and most boards prohibit redistribution. So MathHub indexes which papers exist, by year and session, and every link opens the paper on the exam board's own site — Oxford's Mathematical Institute for the MAT, UAT UK for the TMUA, Cambridge International for CIE, the Korea Institute for Curriculum and Evaluation for the CSAT, and so on. You get the paper from the people who wrote it.
How solutions get checked
A worked solution goes up only after I have done the problem myself and reconciled my answer with the official mark scheme. Where the two differ, or where the mark scheme accepts an approach I think is harder than it needs to be, the page says so rather than quietly picking one.
Mathematics is not immune to typos, and I would rather hear about one than leave it standing. If something on a page is wrong, tell me and I will fix it and say what changed.
Contact
- Written by
- Daniel Park
- Based in
- Seoul, South Korea
- [email protected]
- Teaches
- Korean CSAT & school mathematics · SAT · AP Calculus and Statistics · IB Mathematics AA/AI · A-Level and IGCSE · TMUA and Oxford MAT
Corrections, questions about a particular problem, and requests for a topic that is missing are all welcome. I read every message myself, so a reply may take a few days during term.