The curriculum more than doubled. • 135 lessons across 18 tracks, up from 57 across 13 • Dart 3, properly: records, patterns, sealed classes and generics • Reaching everyone: accessibility, ten languages, tablets and foldables • Release engineering: versions, flavors, signing keys, pipelines and secrets • Data for real: SQLite, sockets, Firebase, push and crash reporting • Making money: ads, in-app purchases, and which payment rail you may use • Further out: video, documents, game loops, 3D, and building on a model Also new: • 80 widgets in the library, every one animated • 45 errors you will actually hit — including the Gradle, Xcode and App Store failures that no tutorial covers • 20 real apps pulled apart and rebuilt. Google Maps, Slack, Notion, Strava and Robinhood join the first fifteen • 26 packages in the toolbelt, so every line of a real pubspec is explained The concept map was rebuilt to stay readable at 129 ideas: more room between nodes, rows ordered so far fewer lines cross, and a button that fits the whole map on screen.