TOEFL Adequate command of spoken and written English is essential to success in graduate study at Harvard. Applicants who are non-native English speakers and who received their undergraduate degree from an academic institution where English is not the primary language of instruction must take the Internet based test (iBT) of the Test of English as a Foreign Language (TOEFL), administered by the Educational Testing Service (ETS). A minimum score of 80 is required, but some programs may require a higher score. Applicants who took the TOEFL more than two years ago (i.e. before September 1, 2016, for fall 2018 admission) must retake the test. No test other than the iBT TOEFL will be accepted as proof of English proficiency; a master's degree is not accepted as proof of English proficiency. GRE GSAS requires that prospective students (except applicants to the Department of Astronomy program) present scores of the General Test of the Graduate Record Examinations (GRE). Scores from either the computer-delivered or the paper-delivered test are acceptable. Many programs also require one of the GRE Subject Tests; visit the relevant department in the Programs of Study for more information.It is essential that you arrange to take the GRE in sufficient time for score reports to reach us by the application deadline. GRE scores are valid for five years (i.e. scores must be from no earlier than September 1, 2012, for fall 2018 admission). If you have personal score reports available from tests taken within the last five years, you can upload them to your online application for consideration by the admissions committee.All prospective students (except applicants to the Department of Astronomy program) must take the general test of the Graduate Record Examination (GRE), though some programs may permit applicants to substitute scores from the Graduate Management Admissions Test (GMAT). GMAT All prospective students (except applicants to the Department of Astronomy program) must take the general test of the Graduate Record Examination (GRE), though some programs may permit applicants to substitute scores from the Graduate Management Admissions Test (GMAT).