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Free interactive lessons in coding, CDL prep, web dev, chess, and more. No subscriptions. No catch.
14
Subjects
65+
CDL questions
50
Coding lessons
100%
Free
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What do you want to learn?
Coding, CDL Prep, Chess, and Web Dev are live now. AI tools, math, science, history, and languages coming throughout 2026.
Coding
Python, JavaScript, C++, Java
Artificial Intelligence
Machine learning, neural nets, prompt engineering
Mathematics
Algebra through calculus and statistics
Science
Physics, chemistry, biology
History
Ancient civilizations to the modern era
English
Grammar, vocabulary, writing
Spanish
Vocabulary, grammar, conversation
Thai
Alphabet, tones, phrases
Chess
Openings, tactics, strategy
CDL Test Prep
General knowledge, air brakes, hazmat, pre-trip
AI Tools
Claude, ChatGPT, Grok — hands-on guides
Russian
Cyrillic alphabet, grammar, conversation
Chinese (Mandarin)
Pinyin, characters, tones, conversation
Web Development
HTML, CSS, JavaScript — build real websites
How it works
Three steps. That's it.
Every subject follows the same simple format.
Pick your subject
Coding, CDL test prep, AI tools, chess, math, languages — choose what matters to you.
Learn by doing
Run code in your browser, take practice tests with instant feedback, play study games.
Track and repeat
See progress, build streaks, review what you missed. Detailed explanations every time.
Coding
Our flagship subject. 12 modules across four languages, from printing “Hello World” to designing scalable systems.
- Write and execute code in your browser
- Data structures, algorithms, OOP, system design
- Real projects, not toy exercises
Programming Fundamentals
4 lessons
Data Structures
2 lessons
Object-Oriented Design
1 lesson
Trees, Graphs & Hashing
0 lessons
Algorithms
1 lesson
CDL Prep
Pass your Commercial Driver's License exam on the first try. Real practice questions with detailed explanations and visual study guides.
- 65 practice questions across 6 categories
- Instant feedback with detailed explanations
- Visual diagrams: inspection, air brakes, hazmat
Real CDL questions
Based on actual DMV topics
Score tracking
Progress per category
80% pass threshold
Same as the real test
Blog
All posts →Explore more
CDL Test Prep
New65 real practice questions with diagrams — air brakes, hazmat, pre-trip
Study Games
Play nowSpeed typing, flashcards, memory match, and code puzzles
Quizzes
InteractiveTest your Python, JavaScript, and AI knowledge with instant feedback
All Courses
14 subjectsBrowse every subject — coding, AI, math, CDL, languages, and more
Coding Curriculum
240+ hours12 modules from fundamentals to system design across 4 languages
Learning Blog
11 articlesGuides on Claude, ChatGPT, Grok, coding, CDL, and study tips
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No sign-up. No credit card. No installs. Just pick what you want to learn and go.