The F-1 visa which is for full-time students who are enrolled in an academic or language program. F-1 students can stay in the US for the whole duration of their academic program plus 2 months. It is a prerequisite for F-1 students to maintain a full-time course load and complete their studies by the expiration date listed on the I-20 form. American Online Service helps to fill up ds-160 and interview counselling as well. You can see some photographs of the students.