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 I-765 for standard post-completion OPT can be filed up to 90 days before the program end-date and up to 60 days after the program end-date, provided that it is filed within 30 days of the date the DSO enters the OPT recommendation into SEVIS. 2  If approved, student is issued an EAD.