Anthropic's Prompt Engineering Interactive Tutorial

Anthropic's Prompt Engineering Interactive Tutorial is a free, open-source course (CC BY-NC 4.0) that teaches prompt engineering for Claude through nine structured chapters and an advanced appendix. It is genuinely hands-on: each lesson includes an example playground where you edit prompts and immediately see how Claude's responses change, delivered as Jupyter notebooks or, more accessibly, a Google Sheets version. With 36k+ GitHub stars it is one of the most widely used free prompt engineering resources, and being authored by the model provider makes the techniques authoritative. The trade-off is that it teaches against Claude's API (it uses the low-cost Claude 3 Haiku in examples) and is a self-guided repository rather than a polished video course with a certificate. An excellent, low-cost way to actually practice prompting, best for those willing to run code or a spreadsheet.

Free, open-source, and unusually practical: it lets you actually write and troubleshoot prompts against Claude with first-party guidance, which is more valuable than passive reading for learning prompt engineering.

Best for: Developers, technical practitioners, and motivated learners who want hands-on, structured practice writing and debugging prompts for Claude, and who are comfortable running a Jupyter notebook or working in a Google Sheet.

Skip if: Learners who want a polished video course, a completion certificate, or a fully provider-neutral overview; also less ideal for those unwilling to set up notebooks or an API key.