TAs have the same grading permissions as instructors. They are able to score polls, class videos, and assignments.
However, TAs have a limited view when it comes to excusing absences. They have access to the Absences page under Grading in the left navigation menu. On the Absences page, they can view make-up work and excuse absences for sections they TA. Note that TAs do not have access to other pages under Grading that faculty can view.
For more information, see grading assignments, grading polls, and grading classroom participation. TAs see the same user interface as an instructor when grading.