In short
- Plagiarism is using someone else’s words or ideas without saying so, on purpose or not.
- Most of it starts in your notes, not your essay.
- Keep quotes and your own thoughts apart, and note the source and page for everything.
- Cite as you write, never “later”.
Plagiarism checkers like Turnitin don’t know whether you meant it. They find text that matches a source, and a marker decides. The good news: almost all accidental plagiarism comes from a handful of habits you can change today.
This lesson is part of step 4, reference as you go.
How it happens by accident
Copied notes
You copy a sentence into your notes to come back to. Weeks later it reads like something you wrote, and it goes into the essay without quotation marks.
“I’ll cite it later”
You write the point, mean to add the citation, and run out of time. The idea is now unattributed.
A paraphrase that’s too close
You change a few words but keep the sentence’s shape. To a marker, and a checker, it still matches the source.
Patchwork
Sentences from three sources stitched together with a few of your own words in between. Each piece is someone else’s.
Reusing your own work
Handing in a paragraph you already submitted for another assignment, without asking. Most institutions call this self-plagiarism.
Habits that prevent it
- Mark quotes as quotes in your notes. Quotation marks, the source and the page, every time. If you can’t tell later whether you wrote it, treat it as a quote.
- Write your own notes away from the source. Read a section, close it, then write what you understood. Your notes are then in your words from the start.
- Cite in the same moment you write. A citation added now takes seconds; one added in a panic the night before is often missed.
- Check your paraphrases. Put the original next to yours. If the order of ideas and the structure match, rewrite it. See paraphrasing well.
- Ask before you reuse. If you want to build on earlier work, ask your teacher or tutor first.
A quick test
| In your essay | Is it plagiarism? |
|---|---|
| A source’s sentence in quotation marks, cited with the page | No. That’s a quote, done properly. |
| A source’s idea in your own words, cited | No. That’s a paraphrase, done properly. |
| A source’s idea in your own words, not cited | Yes. The idea is still theirs. |
| A source’s sentence with a few words swapped, cited | Usually, yes. Quote it or rewrite it properly. |
If you think you’ve done it
Found an uncited idea or an unmarked quote in work you’ve already drafted? Fix it now: add the citation, or turn the copied wording into a proper quote or paraphrase. If the work is already handed in, talk to your teacher or tutor early. Being open about a genuine mistake is treated very differently from hiding one.
Keep your words your own in KanBananza and Peel
- Quotes mixed in with your own notes. Each source keeps Notes and quotes, with a page number for each and a switch that marks a quote as a quote, so copied words never pass as yours. Free
- The quote is in a PDF. Highlight it in Peel’s reader and it’s saved as a quote with its printed page number. Peel, free
- Did I paraphrase that, or copy it? Peel’s paraphrase coach checks your sentence against the source and gives hints, never new wording, so the words stay yours. Pip
For your level
GCSE and A level
Coursework and the EPQ include a declaration that the work is your own. Your teacher has to sign it too, so they’ll check. Cite everything you used.
University
Read your university’s academic integrity policy once, in your first term. Many run a short course on it, and some let you check a draft before you submit.
Dissertations
Long projects mean months-old notes. Keep every source’s notes and quotes in one place, clearly marked, from the first day.
Questions
What counts as plagiarism?
Presenting someone else’s words, ideas, data or images as your own, whether you meant to or not. That includes copying without quotation marks, paraphrasing without a citation, and reusing your own earlier marked work without saying so.
Can I be accused of plagiarism if I didn’t mean it?
Yes. Most schools and universities judge the work, not the intention, though accidental cases are usually treated more gently, especially early on. The best protection is good notes and citing as you write.
Does changing a few words make it my own?
No. Swapping words while keeping the same sentence structure and ideas is still plagiarism. A real paraphrase rewrites the idea in your own words and structure, and still cites the source.
Is using AI plagiarism?
It depends on your school’s or university’s rules. Many treat AI-written text you hand in as your own as academic misconduct. Check your course’s AI policy, and keep a note of any help you used.
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