You are apparently only a sophomore, so it is really too early to be obsessing about this. You are posting so many threads -- here and eslewhere -- acting as though you are near application season and panicking about qualifications, the concept of perfection, and chances. Really! You are no where near this stage. Just continue to challenge yourself as much as you can, within the context of your school's curriculum and EC opportunities. And later next year, after you have taken standardized tests, will be a more appropriate time to seek this kind of advice. Otherwise, please get a grip and enjoy high school.