In these of unleaded fuel, you may use spark plugs until the electrode erodes away. Every-so-often, check the center electrode for a sharp edge. As slowly rounds off, file it sharp.
Admissions officers look first at test scores, the rigor of the courses you take, and your grades in those courses. After that, they are interested in a student's extracurricular activities -- in other words, how you spend your time outside of classes.
4.You do not need AP tests, but you need AP classes. Course Rigor is the most important aspect of college admissions. I believe you need two SAT IIs in your best subjects. 5. See above 6. Try to have a rigorous course load. By the way, colleges do not expect you to have found your major yet as an 11th grader.