Scrimba
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Scrimba's core innovation is its interactive screencast format: instead of a static video, you can pause at any point and start typing directly into the instructor's live code, testing your own changes before pressing play again, which closes the usual gap between watching someone code and actually practicing it yourself.
Its catalog concentrates on front-end development, JavaScript, React, and CSS, with a growing set of courses on building with AI tools and APIs, taught by a mix of well-known developer educators. It fits a visual, hands-on learner working through front-end or AI-engineering topics who wants to tinker with real code inside every lesson, rather than a broad, subject-agnostic platform like Codecademy.