Instructors can control whether students can access and view their grades in Moodle in a personalized grade report. By default, this report is set to be visible to students, meaning students can see their own grades for any graded activities that are not hidden from students.
Note: Even if the Gradebook is hidden from students, students can still view grades for individual assignments by opening the activity and reviewing their submission. To learn how to hide and show grades for a particular activity, see Control Visibility of Grade Items in Moodle.
There are two ways you can approach releasing a course gradebook to students; use the Quick Settings block, or go to the Course settings page.
If the Quick Settings block has been added to your course, you can release or hide the course gradebook directly from your course page. (See Add & Remove Blocks in Moodle.)