Material written and developed by you
If you have developed compendia, PowerPoint presentations, assignments, texts and the like for your students, you are free to copy such material. If you enclose text material from other sources (from books, websites etc.) in your own material, you must follow the 20 percent max. 50 pages rule for this material. Remember to state the source.
If you have developed material that has been published, such material is, of course, protected by the Danish Copyright Act.