Hi, based on the discussions about duties of RA/TA. I just found this from NOC website.
Main duties
Post-secondary teaching assistants perform some or all of the following duties:
Organize reference materials, visual aids and other materials as required by university professors or college teachers for lectures
Conduct seminars, discussion groups and laboratory sessions to supplement lectures
Assist in the preparation and administration of examinations
Grade examinations, term papers and laboratory reports.
Research assistants perform some or all of the following duties:
Conduct literature reviews, surveys, laboratory experiments and other research for use in scholarly publications
Compile research results and assist professors in the analysis of results and the preparation of journal articles or papers.
Post-secondary teaching and research assistants specialize in a subject matter based on their field of study.
I didn't write my duties like these. I am a dead man now.