During BCT you will have the opportunity to sit for exams to validate your classes. If you are taking HL Math, be sure to sit for the Statistics exam because you may have sufficient knowledge to validate a semester of Stats. This will not get you out of taking math classes, it will move you to a higher tier of math. Also, if you wish to validate physics, because you are taking HL Physics, you will do that prior to the start of Yuk (sophomore) year. You can have your scores sent to USMA and they will take them into consideration for placement. If you validate courses, you still have to take a full schedule and stay for the entire 47 months...it just opens up more time for elective or working on a double major or minor.