B barryhan.net
Barry Han

A song I played back when I was just starting to learn guitar.

Hi, I'm Barry 👋

I'm a Grade 9 student building four workbenches — one per contest I'm chasing.

Math is my home turf — I keep coming back to it because a proof either works or it doesn't, and that honesty is addictive. Outside class I play guitar and bass (rock, some funk). On this site I keep public notes for the contests I'm preparing for: HiMCM modeling, USAAIO, the digital SAT, and USACO. Public because writing it down forces me to actually understand it.

HiMCM → USAAIO → SAT → USACO →

Current projects

Active workbenches. Click any card to open the dedicated site.

HM

HiMCM 2026

High School Mathematical Contest in Modeling. Two-week team contest, real-world problems, 25-page paper. Target: November 4–17, 2026.

● Active Open workbench →
AI

USAAIO

USA AI Olympiad. Math foundations, Python data stack, classical ML, PyTorch deep learning, transformers — selection path to IOAI / IAIO.

● Active Open workbench →
SA

SAT

Digital SAT prep. Adaptive Reading & Writing, Math sections, Bluebook full-length practice, error-log workflow that turns missed questions into permanent gains.

● Active Open workbench →
CS

USACO

USA Computing Olympiad. Algorithms and data structures, progressing from Bronze through Platinum across four contest rounds (Dec, Jan, Feb, US Open).

● Active Open workbench →

About me

I'm Barry, a Grade 9 student in the US. The subjects that stuck for me are math and, lately, machine learning — both reward you for being precise about what you actually know vs. what you've been told. Outside school I play guitar and bass, mostly rock and funk.

Why this site exists: I noticed that when I "study" a topic by reading, I forget it in a week. When I write it down for someone else to read, I remember it. So every contest I prep for gets its own workbench here — notes I wrote in my own words, drills, practice problems, mocks, and a plan with real dates. If it helps another student, even better. Static HTML, deployed to Cloudflare Pages.

Built and maintained by me. If you spot a mistake, please tell me — the contest pages especially are works in progress and I'd rather be corrected than confidently wrong.