Can I use primary sources and historical images in resources I sell?
Many primary sources are old enough to be in the public domain, which makes history one of the friendlier subjects for sellers. But be careful with the details:
- The original vs the reproduction. An 18th-century letter may be public domain, but a modern transcription with notes, a translation or a museum's photo of the document can carry its own rights or terms. Check the terms of the archive or collection you take it from.
- 20th-century material. Photos, speeches, posters and newspapers from the last hundred years are often still protected. Copyright terms differ between countries.
- Excerpts. Short extracts from a source can work well for teaching, but quotation rules differ by country. Do not rely on them for large chunks.
- Your own writing. Background readings, summaries and questions you wrote yourself are always yours.
Record where each source came from and its terms, alongside your clip art licenses. Many national archives and libraries publish clear reuse terms. Copyright basics for teacher-authors explains public domain in general terms.

