If you are considering a graduate student for a teaching assistantship that involves the direct instruction of undergraduate students, they need to be certified in oral english proficiency by the oept, toefl ibt, or ielts, unless they 1) are natives of the countries listedbelow and 2) grew up speaking english in their home.
Native english speaking countries list
Esl resourcesprivate tutorsinformation for international graduate studentsresearch abstractsopportunities for graduate assistantslist of english-speaking countriesposition descriptions.
List of native english speaking countries
)oept technical manualoept retest policyenglish 62000how to register for engl 62000course objectives and goalsprofessional development sectionapplication to the professional development section of engl 62000volunteervolunteer opportunities for undergraduate studentsregister nowvolunteer information for facultyresourcescommunity esl resourcesprivate tutorsinformation for international graduate studentsresearch abstractsopportunities for graduate assistantslist of english-speaking countriesposition descriptionsabout usoepp 2012 yearbookpolicies and memosfrequently asked questionsoepp staffcontact usfor graduate studentspurdue's sls programresearch abstractsopportunities for graduate assistantsfor international graduate studentscertification methodsoral english proficiency testenglish 62000resources for international studentsfrequently asked questionsoept practice testposition descriptionsinformation for international graduate studentsfor departmental liaisonsoral english proficiency testtest schedulecertification methodsenglish 62000policies and memosresourcesfrequently asked questionsoept practice testlist of english-speaking countriesfor facultyvolunteer information for facultyvolunteer opportunities for undergraduate studentscertification methodsabout uscut-off scores for admission & certificationfrequently asked questionsfor undergraduate studentsvolunteer opportunities for undergraduate studentsopportunities to get involved with the oeppmwalt 2016call for papersgraduate student awards.
However, it is quite possible that individuals from countries on this list may not be native speakers of english.