When you use the words or original ideas of another person in your writing, you need to document, or give credit to, the sources of those words or ideas. If exact words from the original are used, quotation marks are necessary. If you paraphrase, or restate the idea in your own words, quotation marks are not required, but documentation of the source is still required.
Copying someone else's work or ideas and misrepresenting them as your own is called plagiarism. Committing plagiarism, whether intentionally or unintentionally, is a violation of academic integrity and can result in suspension from school. The best way to avoid plagiarism is to: