Computer science, made tangible
See the logic.
Feel the aha.
Skills Playground turns foundational interview topics into clear, interactive lessons built for lasting understanding.
An interactive approach to
technical fundamentals.
Start here
Small lessons.
Big foundations.
Every lesson focuses on one essential idea, then gives you a way to watch it work.
Implementing a Dynamic Array
See how expandable storage makes appending feel instant, even when the backing array has to grow.
Extra Dynamic Array Operations
Learn how inserting, removing, and searching values changes the work a dynamic array must do.
String Manipulation
Inspect character codes, reason about immutable strings, and trace split, join, and matching operations.
Two Pointers
Move through data with inward, slow-and-fast, and parallel pointer patterns that make each comparison count.
Interview prep,
made personal.
Review your front-end strengths, focus on the areas to sharpen, and walk into your next conversation with a practical checklist.
Code under
your own clock.
Choose a time limit, write your solution in the browser, then validate your approach with a focused manual review.
Practice the React
that gets assessed.
Follow a focused path through core patterns, debugging, implementation, and a realistic timed rehearsal.