· UW–Madison students have the opportunity to explore the world through more than 100 summer programs in a variety. Welcome to our International Student FAQ! With such a large international student population in our Statistics department we know that students often have specific questions. With the new STEM classification, students on an F-1 visa now qualify for the Optional Practical Training Extension for STEM Students (STEM OPT), which adds an additional 24-month. 2021. . The ISS/SA Office has information for students on purchasing a. The final evaluation must be completed at the end of the 24-Month STEM OPT. edu or.