You should enroll in a boarding or day high school for the next two years: grades 11-12, in order to graduate from high school in the United States and then proceed to university.

In principle, yes. However, the application requires the sponsor to provide all necessary financial income documents and proof of the familial relationship with the sponsored student.

When applying for a visa, you will be interviewed at the U.S. Consulate or Embassy. You need to satisfy the interviewer on issues related to your application, such as your study plans in the United States, academic programs you have completed in Vietnam, English proficiency, the school you intend to enroll in the U.S., financial conditions, and post-graduation employment plans.

American universities and colleges use a grading system based on letters rather than numeric grades like in Vietnamese universities. Each of your courses is evaluated and graded continuously. Everything you do in a course contributes to your final semester grade. This includes not only exams but also experimental reports, homework assignments, essays, participation in class discussions, and attendance. The grading scale typically ranges as follows:

90 – 100% = A; 80 – 89% = B; 70 – 79% = C; 60 – 69% = D; 50 – 59% = E; 40 – 49% = F