Mobile App Development

Four introductory competencies: HTML, CSS, JavaScript, and React. React Native extends the React competency when mobile tooling is ready. Introduce TypeScript after JavaScript fundamentals.

Edit lessons

Write lesson prose directly in lessons/<competency>/lesson.md. These are ordinary Markdown files, with headings, bold vocabulary, inline code, fenced examples, and GitHub previews. Each lesson can have its own structure. The starter beside it is a normal source file. course.json contains navigation paths only, not lesson prose.

The shared Playground website publishes these files with its common layout, highlighted editor, and preview. No student account secrets belong in browser examples.