iirc, turnitin scans your document for any series of four words in order, against its stored data. So all those little phrases you use like "therefore, it is shown", "figure 2 shows that the" etc... Will all be recorded as plagiarism. It's expected you'll have a certain percentage, 10-20% is standard for a completely original document.
Turnitin is incredibly easy to cheat! You can get a 0% plagiarised stat (which would be a mistake to do, because it would look suspiciously low) on a fully cut and paste essay, with a few simple tricks.
Also, all my lecturers said "you must submit all assignments to turnitin for this course", but in 3 years at uni, I only ever submitted a single paper to turnitin. I reused portions of several essays across several subjects, safe in the knowledge they were never submitted to turnitin. Lecturers are lazy and don't follow it up, at least at my uni.
Turnitin is incredibly easy to cheat! You can get a 0% plagiarised stat (which would be a mistake to do, because it would look suspiciously low) on a fully cut and paste essay, with a few simple tricks.
Also, all my lecturers said "you must submit all assignments to turnitin for this course", but in 3 years at uni, I only ever submitted a single paper to turnitin. I reused portions of several essays across several subjects, safe in the knowledge they were never submitted to turnitin. Lecturers are lazy and don't follow it up, at least at my uni.