In addition, you must have SAT or ACT and writing scores. If you choose to hand in SAT, you must also hand in two SAT II scores; If you hand in ACT, you can hand in your SAT II scores voluntarily (if you do well in the exam, I suggest you hand them in). I remember that the average scores of SAT reading, SAT mathematics and SAT writing were 670-760, 690-790 and 680-780 respectively. The average score of ACT is 30-34.
In addition, you also need high school GPA scores, school attendance or graduation certificates, letters of recommendation, personal statements, resumes, reading plans, other documents or portfolios useful for the application, and financial-related certificates. If you are good at winning prizes, it will also be helpful for admission. These are the basic requirements for applying to Duke University. You can ask me again if you have any questions.