Copyright and plagiarism
You might think you know what plagiarism is, and how to avoid it. But Wikipedia is a little bit different. The rules cover not only copy-and-paste plagiarism, but also close paraphrasing and copyright violations. And the stakes are high: the consequences of committing plagiarism in a Wikipedia class assignment are the same as handing in a paper you didn't write.
Plagiarism and copyright violations are disruptive and time-consuming for volunteers to clean up. Except for brief quotations, copying content from copyrighted sources onto Wikipedia is against policy.
This video lays out what you need to know to avoid these pitfalls!