Computer Science
Computer Science – 18+ UNIQUE Free Educational Websites (Grades K–12)
Free programming sandboxes, computational thinking platforms, web development courses, algorithmic problem solving, and artificial intelligence foundations.
Code.org
Global non-profit platform offering the famous Hour of Code, Computer Science Fundamentals, App Lab, and Game Lab for K–12.
Scratch (MIT Media Lab)
Block-based visual programming environment allowing students to create interactive stories, animations, games, and simulations.
freeCodeCamp
Comprehensive 100% free programming curriculum covering HTML5, CSS3, JavaScript, Python, Data Analysis, and Algorithms with certificates.
CS50: Introduction to Computer Science (Harvard)
World-famous introductory CS course by Professor David J. Malan covering C, Python, SQL, HTML, CSS, JavaScript, and algorithms.
W3Schools
The world's largest web developer learning platform with interactive "Try It Yourself" editors for HTML, CSS, JS, Python, SQL, and C++.
Khan Academy - Computing
Interactive lessons in JavaScript drawing and animation, HTML/CSS web design, SQL database querying, and Computer Science principles.
The Odin Project
Free full-stack open-source curriculum guiding learners through real-world web projects with Git, Node.js, and React.
Blockly Games
Series of educational games developed by Google that teach foundational programming concepts using visual blocks.
CodeCombat
Fantasy RPG coding game where students type real Python or JavaScript code to control heroes, solve puzzles, and defeat enemies.
MIT App Inventor
Intuitive visual programming environment allowing anyone to build functional mobile applications for Android and iOS devices.
MDN Web Docs (Mozilla)
The definitive documentation, tutorials, and references for web standards: HTML, CSS, JavaScript, and Web APIs.
LeetCode
Premier platform for practicing algorithmic problem solving, data structures, and preparing for technical programming competitions.
HackerRank
Coding challenges, tutorials, and competitive leaderboards across Python, Java, C++, algorithms, and artificial intelligence.
SoloLearn
Bite-sized mobile and web coding lessons with in-browser code compilers and an active peer coding community.
CS Unplugged
Collection of free learning activities that teach Computer Science concepts through games, magic tricks, and puzzles without a computer.
CodePen
Online social development environment for front-end web developers to experiment with HTML, CSS, and JavaScript.
Replit
Collaborative browser-based IDE supporting over 50 programming languages with instant cloud hosting.
CodinGame
Challenge-based multiplayer gaming platform where developers level up their coding skills by solving fun puzzles in 25+ languages.
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Computer Science Study Topics
Programming with Python
Syntax, control flows, data structures (lists, dicts), functions, and automation.
Web Technologies (HTML/CSS/JS)
Responsive UI layouts, CSS Flexbox/Grid, DOM manipulation, and web apps.
Data Structures & Algorithms
Sorting, searching, arrays, stacks, queues, graphs, and Big-O efficiency.
Artificial Intelligence & Data Basics
Machine learning concepts, prompt engineering, data cleaning, and ethics in AI.
Directory Overview
- Subject: Computer Science
- Total Websites: 18 Platforms
- Target Levels: Grades K–12
- Access Type: 100% Free Resources
- Quality Status: Educator Verified
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