Is there any way that TAs can make graded assignments without it showing up in the gradebook?
Hi Shadab and welcome to the Canvas Community!
Generally when a TA grades an assignment it will show up in the gradebook for students to review. You could try moderated grading and see if that is what you are looking for. In a nutshell you turn on moderated grading and assign graders. They grade the work and then you decide which grade is the final score. you can read about moderated grading at: How do I add a moderated assignment to be graded by multiple reviewers? Hope this helps :-)
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