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.
The Office of Admissions must receive all of the information used to make an admission decision by the published deadlines.* Please note that there are two deadlines with corresponding decision dates for summer and fall terms. Generally, the University does not accept freshman applications for the spring term.