Ready to explore
Sorting · 20 min
Insertion sort
Put each number in its place, just like sorting a hand of cards.
01 / Learning path
A little curiosity goes a long way
Big ideas.
Small steps.
Real understanding.
Algorithms don’t have to feel like a puzzle with missing pieces. See how they work, try things out, and make the ideas your own.
Explore the learning path Beginner-friendly No account needed
INSIDE THE ALGORITHM 01 / 05
A place for every number.
0
1
2
3
4
← sorted prefix →
↑ next key
insertion_sortOne step at a time.
Oh, now it clicks.
01See the idea.
Clear explanations. Real examples.
02Try it yourself.
Change the input. Follow each step.
03Make it stick.
Play, predict, and test what you know.
Your next “aha!” starts here
Meet the building blocks.
Five foundational topics. Plenty of room to experiment.
Start with insertion sort. More lessons are on their way.
Upcoming
Data structures · 10 min
Stacks
Explore why the last thing in is the first thing out.
02 / Learning path
Upcoming
Data structures · 12 min
Queues
Keep things fair with a first-in, first-out waiting line.
03 / Learning path
Upcoming
Data structures · 15 min
Circular queues
Make a queue wrap around and reuse its empty spaces.
04 / Learning path
Upcoming
Searching · 12 min
Binary search
Find your target by cutting a sorted search space in half.
05 / Learning path
Understanding beats memorizing.
We’re building a space where you can ask “why?”, make mistakes, and try again.