The responsibilities of Teaching Assistants are highly variable, but can include:
Assisting faculty with classroom instruction, records, and assignments.
Leading discussion sections
Meeting with students during office hours.
Conferencing with students individually or in small groups.
Delivering lectures or guest lectures
Leading group projects or discussions
Grading assignments or papers
Managing course communications in Canvas
Preparing laboratory materials
Recording and calculating grades
Providing feedback on assignments
Enforcing laboratory rules and procedures.
Proctoring examinations
Taking attendance or monitoring participation.
Obtaining and distributing course materials.
Ordering course textbooks and monitoring supply.
Teaching Assistants are also responsible for being timely and reliable and showing up to class at the correct time and without unexcused absences. Programs and even individual instructors usually have procedures for emergency absences, which Teaching Assistants should understand at the beginning of the semester.