TurnItIn for Teachers
TurnitIn is an online plagiarism prevention tool that we have used here at DE for a number of years. It may also be used for teacher to provide feedback and online annotatons of work to students.
As of May 2017, TurnItIn is now integrated with My DE. In order to have students submit work to the TurnItIn service, you now only need to create a My DE assignment, choose the TurnItIn option, and change any settings you wish. You no longer need to go create a teacher account or a class. See the first 2:20 of this video on how to get started: Blackbaud K-12 onCampus LTI for Assignments
Information on using the TurnItIn GradeMark system for providing feedback and annotation of student work is here: Providing Feedback and Grading
Also as of May 2017, neither teachers nor students need to setup account or classes if the class exists in My DE.