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Foundations Beginner 9 minute lesson

Files, Folders, and File Extensions

The file organization basics that beginners need before they start building projects.

Every project is made of files. Those files live inside folders. Their names and extensions help a developer understand what each item is for.

Files hold the actual work

A file might contain text, images, styles, or code. The file name and extension often reveal the job of that file.

Folders keep projects readable

Without folders, projects become messy fast. Good structure reduces confusion and makes future changes easier.

Extensions are quiet hints

Extensions like .html, .css, .js, and .py help students understand what role a file plays inside a project.

Mark this lesson complete when the main idea feels clear.

Completion is saved in this browser for now. Full student account tracking comes later with the separate Student Portal.