Document list for M visa -

Form DS-160 (the online Non-immigrant Visa application that is used by Consular Officers to process the visa application). Children or spouses should prepare a separate form.
A passport valid for travel to the United States and with a validity date at least six months beyond the applicant’s intended period of stay in the United States.
One photograph following these requirements: In color;With a plain white background;Taken within the last 6 months;The photo size should be 2 x 2 inches (51 x 51 mm); The photo should be positioned in a way that the head is between 1 and 1 3/8 inches (22 mm and 35 mm) or 50% and 69% of the image’s total height from the bottom of your chin to the top of the head; Do not wear eyeglasses except for medical reasons.
A SEVIS Form I-20;
Receipt of Visa Application Fee
Evidence of sufficient funds;