I called Tennis Warehouse a few weeks ago and inquired about how they measure racquet flexibility/stiffness and assign ratings (RA) given that most of the ratings they assign seem to differ from those listed by the actual racquet manufacturers.
What is Optional Practical Training (OPT)? Optional Practical Training (OPT) is the opportunity for an F-1 student to apply knowledge gained in the classroom to a practical work experience. OPT is a work permit allowing F-1 students to work in the U.S. for up to 12 months following graduation in a job related to their major.
1 Lawful F-1 status for one full academic year prior to applying for OPT. 2  Passport which will not expire for at least six months after you apply for OPT. 3  No more than 364 (less than one year) days of full-time CPT.