A course is a self-contained learning unit made of ordered lessons. Each course page opens with an overview — what you'll build, the level, and estimated time — followed by the full curriculum.

Lessons are grouped and play in sequence.
Some lessons are video, some are written articles — both count toward progress.
A lock icon marks member-only lessons; a preview badge means you can sample it.

Tip: Use the curriculum sidebar (or the left drawer on mobile) to jump between lessons at any time.