If you are an Arizona State University F-1 student currently on 12-month Optional Practical Training who is eligible and interested in a 24-month STEM extension, you should apply 100 days prior to the end date of your OPT Employment Authorization.OPT STEM offers international students the opportunity to gain additional off-campus work experience in their field of study after completion of course studies. The 24-month STEM extension is an additional benefit from U.S. Citizenship and Immigration Services that allows international students in F-1 status who receive a bachelor’s, master’s or doctoral degree in an approved STEM field to apply for a 24-month extension of their standard 12-month post-OPT period.Next stepsSee if you have a STEM-designated degree. Read the instructions and additional information about the 24-month STEM extension. To receive your 24-month STEM extension I-20 for the application, submit your request to the ISSC office 100 days prior to the end date of your Employment Authorization Document card.Employment must be with an E-Verify employer. Please contact the International Students and Scholars Center with any questions at 480-727-4776 or issc@asu.edu.