Following are the documents you need to have as a F-1 visa student:
This travel document should always be valid at least 6 months into the future. Contact your country’s embassy/consulate in the U.S. to renew it.
This is a document issued at an American Consulate outside of the U.S. A valid F-1 visa is only necessary to enter the U.S. If your F-1 visa expires and you leave the U.S. for any reason, you must renew it outside the U.S. before you return to the U.S. The length of your visa dictates how long you can use that visa for entry/re-entry to this country. This document does not determine your length of stay in the United States; it indicates a date range within which you are approved for entry to the US. You can remain in the U.S. with an expired visa, as long as maintaining your F-1 status.
This Arrival/Departure Record is a form which shows the date that you arrived in the U.S. The I-94 will indicate what date you have travelled, your current status and your length of stay. Your I-94 form should state your Duration of Status (D/S). It gives you permission to stay in the country until completion of program as long as you are maintaining legal F-1 status. You may be able to access your electronic I-94 record online: https://i94.cbp.dhs.gov. Please review your I-94 record. If you notice any discrepancies or have any difficulty locating your I-94 record online, please contact International Student Program for assistance.
A Customs and Border Protection (CBP) Officer will stamp your passport with the arrival date and will write “F-1 D/S” on the stamp. F-1 refers to the category of student visa and D/S means “Duration of Status.” Duration of Status indicates that you are allowed to stay in the U.S. for as long as you maintain your F-1 status while you complete your academic program. If you receive a stamp that says anything other than "F-1 D/S," please speak to an international student advisor.