Learn by actually doing

Learn math and programming through short, interactive lessons.

Code-world lessonGoal: reach the flag

Your code finds the way.

The program is the controller. Run it to flood the grid, find the flag, and walk the route. Shuffle the rocks to hand the same code a new problem.

reach-the-flag.jsReady

1function findPath(start, flag) {2  const queue = [[start]];3  const seen = new Set([key(start)]);45  while (queue.length > 0) {6    const path = queue.shift();7    const spot = path.at(-1);8    if (key(spot) === key(flag)) return path;910    for (const next of neighbors(spot)) {11      if (seen.has(key(next))) continue;12      seen.add(key(next));13      queue.push([...path, next]);14    }15  }16}1718me.walk(findPath(me.spot, world.flag));

Programming FundamentalsSample lesson

5 of 6 choices placedOne move left

Build a loop that adapts

Choose the missing condition, then run the rover.

Gems left: 2

Program

Collect both gems.

whilegems remain

whilenot at gem

ifchoose conditionthenmove forward

elseturn right

collect gem

Ctrl / ⌘ + Enter

How people use
Uncharted.

Learning PostgreSQL by writing queries and running them within my browser is a whole new experience!
Rain P.Business Analyst
Answering system design questions by drawing architectural diagrams turned out to be really fun.
Marlon Y.Software Engineer
The DSA course goes deep and still stays fun.
Mark J.Software Engineer
The level of interactivity is Brilliant! No pun intended
Kieth O.Software Engineer
Just finished 2 modules of Matplotlib, I like it. Excited for Uncharted!
Brittany C.Product Engineer

A new way to look
at a familiar idea.

Angle50°

sin(θ): 0.77
cos(θ): 0.64

Learn by trying. Every lesson gives you something to work with.

Keep making progress. Hints help you move forward. Practice helps you remember.

Meet Rini, the tutor
inside every lesson.

Rini is the small folded guide in the corner of your screen. When a lesson stops making sense, ask them. They explain the idea another way so you can finish the thinking yourself.

Ask in your own words.: Type the question the way you would say it out loud. No syntax, no prompt writing.
Answers about this lesson.: Rini reads the lesson you are on, so the help is about the thing in front of you.
A nudge, never the answer.: Rini points at the next thing worth noticing and leaves the thinking to you.