Pick the tech that fits the field you are already in.
Every Code Crunch course in one list, across fifteen schools — a first line of Python through appsec, bioinformatics, product and law. Filter by school and start where your own field already is.
Nothing to install: you write and run real code in the browser, finish a project every week, and earn a Code Crunch certificate at the end.
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Every course is open-source and accepts pull requests. Become a mentor, fix a typo, or add a lecture — your name goes in the credits.