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Web development
HTML
17 lessons
CSS
19 lessons
JavaScript
31 lessons
React
12 lessons
Bootstrap
10 lessons
Programming
Python
64 lessons
Java
23 lessons
C
15 lessons
C++
20 lessons
PHP
15 lessons
Data & analysis
SQL
23 lessons
NumPy
10 lessons
Pandas
12 lessons
Excel
15 lessons
Frameworks & formats
XML
8 lessons
Django
12 lessons
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Certifications
AZ-900: Microsoft Azure Fundamentals
Overview
What the exam covers and how to prepare
Course pathway
Every step to exam day, ticked off as you go
Study guide
30 lessons on every skill measured
Mock tests
Five full-length exams, scored out of 1000
Quizzes and weak spots
Build a quiz, or drill what you missed
Practice
Coding challenges
Solve problems, checked by hidden tests
Quizzes
Ten fresh questions per course, every round
AI question generator
New questions on any topic you choose
Games
Treasure Quest, Speed Run and Code Puzzles
Progress and badges
XP, streaks and milestones
Games
All games
Learn by playing, with your course's crewmate
Treasure Quest
Answer your way across eight islands
Speed Run
As many right answers as you can in 60 seconds
Code Puzzle
Put real code back in the right order
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Python
HTML
CSS
JavaScript
Java
C
C++
PHP
React
SQL
Bootstrap
NumPy
Pandas
Excel
XML
Django
AZ-900
Playground
Open the playground
A VS Code-style editor, right in your browser
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Python
JavaScript
HTML/CSS
React
SQL
Java
C
C++
PHP
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Courses
16 languages and tools
Certifications
AZ-900 exam prep
Practice
Challenges and quizzes
Games
Learn by playing
Playground
Code in your browser
Contact
Talk to the team
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Python
HTML
CSS
JavaScript
Java
C
C++
PHP
React
SQL
Bootstrap
NumPy
Pandas
Excel
XML
Django
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Games
C
C games
Play with Shelly
Hi, I'm Shelly! C is slow and steady to learn, and it shows you how computers really work.
Treasure Quest
Speed Run
Code Puzzle
