If your students are noticing that their submissions are being flagged with a lot of highlighted portions, even if there is a low plagiarism percentage, you may need to "refresh" or generate a new similarity report in Turnitin. This will account for checking plagiarism with any new additions to Turnitin's database, as well as resolve issues with unintended highlighted portions in a student's submission.
Instructions can be found in this article by Turnitin.
Article ID: 472
Created On: Tue, Jul 7, 2020 at 10:30 AM
Last Updated On: Tue, Jul 7, 2020 at 10:30 AM
Authored by: Melody Fan [email@example.com]
Online URL: https://kb.ccconline.org/article.php?id=472