Research assistants (RA) help professors with various research-related tasks, such as bibliographic investigation, construction of measuring instruments, data collection and processing. Depending on program requirements, teaching assistants (TA) and research assistants (RAs) may combine more than one position but are not allowed to work more than a total of 20 hours a week without special approval of the program director. TAs and RAs are eligible for tuition remission and health insurance. Many RA and TA positions require clinical activities or contact with human subjects. Students in those positions will have to present a North Carolina license to practice nursing, evidence of meeting health and safety requirements and evidence of personal malpractice insurance prior to hiring. RA positions also require meeting human subjects training requirements.