As Pima said, no one knows for sure how many ISS are available. More than likely your son, despite his 3.8 GPA, is farther back in line for a scholarship than a cadet who has a technical major. In my det. last year, an international studies major was passed up for a scholarship who had a 3.9, while 4 engineering majors and a nursing major all received scholarships. All 5 had GPA's marginally to significantly lower than her 3.9.