As with anything I do, I warmly welcome any feedback. (And please do tell me if you spot any errors, thanks!)

📚 Free Textbooks

Written by me. Completed or updating:

Working on it:

Future books:

Further Mathematics Textbook.

O-Level Mathematics Textbook.

O-Level Additional Mathematics Textbook.

Other small things that I wrote back in 2016:

H2 Mathematics Cheatsheet: Download PDFs—colour, black & white.

H1 vs H2 Mathematics: What’s the Difference? Which Should I Take?: download PDF

📖 Free JC Exam Papers

Sorry hor. Unfortunately, I’ve been ordered by the gahmen to remove links to these free JC exam papers, probably because I was spoiling the very lucrative market for these papers. Hopefully you can still find free copies elsewhere. But if not, you can always buy them from just about anywhere (including from your teachers).

💸 Free and Legal Online Resources

The National Library Board’s eResources is pretty good.

Sign up for their myLibraryID and you have free access to a bunch of good stuff, most notably JSTOR. The NLB’s websites can be slow and painful to use though.

For books in the public domain:

Archive.org. (Their wayback machine is also occasionally useful.)

Gallica (French national library).

Google Books (select the “full view” option).

🏴‍☠️ Totally Illegal Resources You Should Never Use

(But if you do choose to use these resources, you’ll find they’re really awesome. Or at least that’s what I’ve heard. Obviously, I’ve never actually used any of these resources in my life.)

Library Genesis for books.

Sci-Hub for academic articles.

And of course, BitTorrent is the old reliable that has stood the test of time.