The complete GitHub Foundations study library — 8 lessons mapped to every domain and topic in the official exam guide. Free to read, no account needed.
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GitHub publishes exactly what the GH-900 tests and how much each part is worth. Here it is — every domain, its weight, the topics inside it, and the lessons that cover them.
Version control and Git fundamentals, how GitHub relates to Git, accounts, organizations and enterprises, the GitHub Flow, Markdown, and GitHub Desktop and Mobile. Official weight range 25–30%.
Repository structure and key files, templates and branches, adding and managing files, repository insights and dashboards, and maintenance best practices. Official weight range 10–15%.
Issues, pull requests and discussions, linking pull requests to issues, templates and assignments, notifications, and Gists, Wikis and GitHub Pages. Official weight range 10–15%.
GitHub Actions, GitHub Copilot and its plans, Codespaces and dev containers, and the github.dev editor. Official weight range 10–15%.
GitHub Projects layouts and configuration, labels, milestones and workflows, saved replies and assignees, and project insights. Official weight range 5–10%.
2FA and passkeys, repository and organization roles and permissions, Enterprise Managed Users and Copilot policies, visibility and branch protection, and organization settings and teams. Official weight range 10–15%.
Open source and GitHub Sponsors, following users and organizations, the GitHub Marketplace, InnerSource, and forks, templates and discoverable repositories. Official weight range 5–10%.
Reading every note front to back is the slowest way to pass. The exam is weighted, so your revision should be too — the blueprint above tells you exactly where the marks are.
Understand Git and GitHub basics carries the most marks on the GH-900, so it earns the most of your attention. Work down the blueprint from the heaviest domain to the lightest rather than starting at domain 1 and grinding forward.
Read each lesson once without stopping to memorise — you are building a map, not a memory. On the second pass, read only the "what's tested" and key-takeaway blocks. If a takeaway surprises you, that lesson goes back on the pile.
Cover a lesson's key takeaways and try to say them out loud from the heading alone. Recall you can produce under your own steam is the only recall that survives a timed exam; recognition on a re-read is not the same thing.
Finishing the notes is not the goal — scoring is. Move to GH-900 practice questions early, then come back to the exact lessons your wrong answers point at. That loop is worth far more than a third read-through.
Exam structure, domain weights and scoring on this page come from the official GH-900 exam guide.