The universe is written in mathematics.Learn to read it, one line at a time.
Every great idea began with someone working it out by hand. Write every step yourself, from everyday numbers to calculus, with Euli beside you.
How Euli helps
Watches every line
Every step is checked against the one before. Euli spots the exact line that slipped.
Nudges, never spoils
A question or a hint, never the answer. You do the thinking.
Talks it through
Ask about any line or paragraph. Euli answers in your own notation.
Explains when you’re stuck
Give up whenever you like. Euli walks you through it, you keep your progress, and it goes on your revisit list.
What Euli sees.
Every line is checked against the one above it. Here is one solution, written the way you would write it, mistake included, and what Euli says about each line.
- 01 / 05
You write the whole solution
Every step is yours, typed into an editor, one line at a time. No multiple choice, no box for the final answer.
- 02 / 05
Submit, and every line is judged
Each line is checked against the one above it, by computation, not by guessing.
- 03 / 05
A mistake is pinned to its line
Line 3 does not follow from line 2. You see where, why, and a value that shows it.
- 04 / 05
Errors carry, and you can see them
Line 4 follows from line 3, so it is marked as carried: correct work, built on a wrong line.
- 05 / 05
Fix it and submit again
Correct line 3, submit, and every line is judged again, all the way to the goal.
- Write the next line
Now you try
The editor just below judges your lines too: press Enter after each one.
Now you try.
Line 1 is the problem. Write the next line and press Enter, and Euli checks every line so far. Try a wrong line too.
Euli remembers
Skills that slip come back to you as a fresh problem or a quick review, until they stick.
Pick a goal
Each track puts its courses in order, so you always know what comes next.