Labs

Interactive lessons you learn by adjusting rather than reading.

35 labs 7 categories Free, no sign-up

Most used

C CSS Flexbox Playground Web Development

Master CSS Flexbox by experimenting with flex properties and seeing instant visual results.

R Responsive Design & Media Queries Web Development

Build layouts that adapt to any screen size using media queries, fluid grids, and responsive units.

Browse by category

A Algorithms 4 labs

Big O Notation · Graphs & BFS/DFS · Recursion · and 1 more

D Databases 3 labs

Database Normalization · SQL Joins · SQL SELECT Basics

D Data Structures 4 labs

Binary Search Trees · Hash Tables & Hash Maps · Linked Lists · and 1 more

Binary & Hexadecimal · Boolean Logic & Logic Gates

N Networking 2 labs

HTTP Request Lifecycle · TCP/IP & DNS

P Programming 10 labs

Array Methods in JavaScript · Git Fundamentals · JavaScript DOM Manipulation · and 7 more

W Web Development 10 labs

Color Theory for Developers · CSS Animations & Transitions · CSS Box Model · and 7 more