---
title: "Sources overview"
description: "What can I build training from?"
canonical_url: "https://support.coassemble.com/articles/sources-overview-GWnkYrrOcv"
md_url: "https://support.coassemble.com/articles/sources-overview-GWnkYrrOcv.md"
---
# What can I build training from?

Coassemble builds courses from content you already have: documents, presentations, and files in your cloud storage. AI turns your source material into an interactive course.

You don't have to start from a blank page. Coassemble can build a course from content you already have, using AI to turn your source material into interactive, mobile-responsive screens. The clearer and better-structured your starting file, the better the result.

## What you can build from

- **Documents:** transform a document (like a Word file or PDF) into a course, and AI breaks your content into logical screens.  
- **Presentations:** convert your existing slides into a course, so you can reuse a deck rather than starting over.  
- **A prompt:** if you don't have a file, describe your topic and AI generates a course from scratch.  
- **Files in your cloud storage:** pull source documents straight from Google Drive or OneDrive.

## Get the best results

AI works from the structure of your source file, so a little preparation goes a long way:

- Use clear headings and bullet points, which help AI interpret hierarchy and flow.  
- For PDFs, use real, text-based files rather than scans, so the text can be read.  
- Think of your file as a first draft, you'll refine the generated course in the editor afterwards.

## Frequently asked questions

### Do I need a file to create a course?

No. You can build from a document or presentation you already have, pull a file from cloud storage, or just describe your topic in a prompt.

### What file types can I use?

Common document and presentation formats, including PDF, Word, PowerPoint, text, and rich text files. Document transformation has a 50MB file size limit.

### Will the generated course be final?

No. AI gives you a strong first draft. You then refine the text, images, and screens in the editor.