practice of osteopathic medicine (series 51.19 in the Department of Education's Classification of Instructional Programs taxonomy). (2) Field of science, technology, engineering, or mathematics The term field of science, technology, engineering, or mathematics means a field included in the Department of Education's Classification of Instructional Programs taxonomy within the summary groups of computer and information sciences and support services, engineering, biological and biomedical sciences, mathematics and statistics, physical sciences, and the series geography and cartography (series 45.07), advanced/graduate dentistry and oral sciences (series 51.05) and nursing (series 51.38). (3) High school The term high school has the meaning given such term in section 8101 of the Elementary and Secondary Education Act of 1965 ( 20 U.S.C. 7801 ). (4) Institution of higher education The term institution of higher education has the same meaning given that term in section 101 of the Higher Education Act of 1965 ( 20 U.S.C. 1001 ). (5) IELTS The term IELTS means the International English Language Testing System. (6) TOEFL The term TOEFL means the Test of English as a Foreign Language. (7) English language proficiency test ranking (A) In general Subject to subparagraph (B), the term English language proficiency test ranking means the decile rank of the applicant’s English language proficiency test score, when compared with all of the other people who took the same test during the same period. (B) Adjustment The Commissioner of U.S. Citizenship and Immigration Services, in consultation with the Secretary of Education, may adjust the decile rank of an applicant’s English language proficiency test score if the number of people taking such test is too small or unusually skewed to make such decile rank inconsistent with the decile rank the applicant would have received if he or she had taken the IELTS or TOEFL. (8) English language proficiency test The term English language proficiency test means— (A) the International English