Thoth Academy is a growing library of study notes, worked practice problems,
and test guides for middle and high school students — built from years
of one-on-one tutoring. Every problem here is written from scratch and solved
by hand before it goes out.
Notes and sample problems are free. The complete practice sets are published
as books.
New material is being typeset and added through 2026 — SSAT algebra
and geometry, AP Calculus, AP Physics 1 and C, and original SAT math
practice sets. See Books for what is coming and when.
Contact
Questions, corrections, or suggestions are always welcome —
joonho@joonho.net