Sharing Code on GitHub
Learn to grab open-source projects, publish your own work to the cloud, and collaborate with other developers. Master the core rhythm of downloading, saving snapshots, and sharing repositories without getting lost in technical jargon.
Like Duolingo, but for Sharing Code on GitHub. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A short one: 9 levels across 2 sections, about 18 minutes end to end, roughly 4 days at five minutes a day. It moves through Grabbing and Exploring Existing Code and Publishing, Updating, and Collaborating. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Sharing Code on GitHub
- A repository on GitHub acts as a project folder
- It stores every past edit and version rather than just today's file state
- Clicking 'Download ZIP' from the Code button gives immediate file access
- ZIP downloads do not require Git software installed on the computer
- A downloaded ZIP is a static one-off copy that won't track new changes
- Cloning links your local folder directly to the GitHub remote repository
- A cloned repo allows you to pull down future updates without re-downloading everything manually
- ZIP snapshots are disconnected files that cannot receive automatic updates
- The README file renders directly on the main page to explain what the project does and how to run it
- The green 'Code' button provides the download and clone options
- The Releases section houses finished milestones
- The default repository view often contains active work in progress that might have bugs
- The Releases tab contains specific, stable milestones that the creator marked as ready for use
- Tags point to frozen snapshots in history meant for reliable distribution
- Saving in an editor only updates the local file on disk, not the Git timeline
- A commit requires an explicit action bundling chosen changes with a descriptive message
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Sharing Code on GitHub the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What makes a repository special compared to a standard computer folder?
Get it right to open this lesson and 8 more in the app.
Where Sharing Code on GitHub takes you
- 1
Grabbing and Exploring Existing Code
- Finding and Downloading Repositories
- 2
Publishing, Updating, and Collaborating
- Saving Snapshots and Pushing Your Work
- Syncing Updates and Sharing with Others
2 sections · 3 units · 9 levels. Built to play, not to enroll.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Sharing Code on GitHub is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
More Technology on Tomo
How Operating Systems Work
Discover the invisible conductor running inside your computer. Learn how operating systems juggle dozens of apps, safeguard your memory, and turn raw hardware into a seamless experience.
How Quantum Computers Work
Understand how quantum computers trade simple silicon switches for the strange rules of physics. Explore superposition, entanglement, and how quantum algorithms solve problems that choke standard supercomputers.
Python: Building Real-World Tools
Move beyond basic syntax to build functional applications. Learn to automate your life, manage complex data, and create software that people actually use.
Hands-On Electronics
Demystify how everyday gadgets work by building and understanding circuits from the ground up. Learn to direct electrical currents, wire components safely, and read circuit behaviors.
Build Your Own Lab Sample Tracker
Stop losing track of samples and start building. Learn to create a professional lab app that prints barcodes, filters data instantly, and uses AI to find exactly what you need.
React: Beyond the Basics
Move past simple components and learn to build fluid, professional interfaces. Master the art of managing complex data flows and optimizing your app's performance for a seamless user experience.
Start Sharing Code on GitHub today.
Download Tomo, search Sharing Code on GitHub, and play your first lesson in under a minute.