I currently teach at a university that uses Turnitin. We allow 30% of your paper to be referenced and 70% to be your original ideas. The 30% that is used from other authors must be cited. If we see that the plagiarism report shows that your 30% comes from other students (especially the ones in your class), we look deeper. I never take the report at face value.
The main point to remember is that Turnitin is a tool. Like any other tool, it can be used correctly or abused.
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I currently teach at a university that uses Turnitin. We allow 30% of your paper to be referenced and 70% to be your original ideas. The 30% that is used from other authors must be cited. If we see that the plagiarism report shows that your 30% comes from other students (especially the ones in your class), we look deeper. I never take the report at face value.
The main point to remember is that Turnitin is a tool. Like any other tool, it can be used correctly or abused.