For Group Assignments we recommend providing grades and feedback online via the Grading page so you can use the setting - Apply grades and feedback to entire group. This setting enables lecturers to mark one student in each group and Moodle will provide a copy of the grade and feedback to all members of the group.
The Anonymous submissions setting should not be enabled for group Assignments. Lecturers can always review the membership of a group so there is no way to mark submissions anonymously.
You must hide the individual assignment grade item while you are marking to ensure that marks and feedback are released at the same time to all students. To do this:
You can use the Feedback comments input field to provide general feedback and upload an external feedback file.
You can also provide up to 2 minutes of multimedia feedback by selecting the microphone icon or the camera icon from the text editor toolbar on the Feedback comments field. These files do not produce captions so you will need to provide written feedback for students to ensure that the feedback is accessible to all students. Students are not able to download multimedia feedback provided via the text editor in the Feedback comments input field.
To apply a different grade and feedback per group member then open the Apply grades and feedback to entire group drop-down menu and select No. Select Save changes to return to the assignment grading area to select the next group member.
This makes the grades and feedback visible and generates an email to students to alert them to their released grade and feedback.