USACO.fun

Learn to code. Build your future.

Coding courses and 1:1 coaching for high school and college students — USACO prep, AP CS, and projects that look good on a college app.

Prepping for USACO, putting together a college-app project, or just figuring out what to learn next? Start here.

Why USACO.fun?

Learn by Doing

Every lesson has something to read, a quiz, and code you actually run. Stuck? The built-in tutor is one click away.

Skills That Stick Around

USACO, AP CS, a portfolio project — we focus on the stuff you'll keep using after the course ends.

Mentors Who Remember

Our coaches recently sat where you're sitting — USACO contests, college apps, first internships. They know what actually helps.

Featured Courses

USACO Bronze

Everything USACO Bronze tests, taught in C++.

AP Computer Science A

Prepare for the AP CSA exam with full Java coverage and practice problems.

Programming Basics

Build a solid foundation before learning your first programming language.

Get Help When You Need It

Getting stuck on a problem for hours isn't a rite of passage. The tutor is built into every lesson, and a real coach is one click away.

AI Tutor on Every Page

Ask for a hint without being handed the answer. The in-lesson tutor nudges you toward the idea so the solution is still yours.

Project Ideas That Aren't Boring

Need something for your college app or portfolio? We'll help you pick a project that fits your interests — not just another to-do list app.

Fast, Honest Feedback

When you get something wrong, you find out why in the same sitting. No waiting, no guessing what went wrong.

Every course comes with the tutor. For bigger questions — USACO prep, college plans, project reviews — book a 1:1 session.