Associate Insturctor, Graduate Assistant,Research Assistant, Adjunct Faculty, etc...

Associate Instructor: A graduate student who is employed as a teacher and engages in activities as a teacher. Teaching consists of the activities of teaching, lecturing, tutoring, instructing, laboratory assisting in an instructional role, and the like in the activity of imparting knowledge, providing the employee has responsibility for assigning grades for at least a portion of a course and has direct contact with students.
Graduate Assistant: A graduate student who, in an academic department or in an administrative office, assists in work associated with the duties of faculty members or administrators, such as library searches, curricular development, or paper grading, and who is not an Associate Instructor, Research Assistant, Student Counselor, or Faculty Assistant.
Research Assistant: A graduate student who is engaged in or assists with original, professional-level research