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.
Yes, but students can get extra time for unsual circumstances: upset stomach, girls periods, vist to nurse, counselor etc. How serious is it to you if a student is just a little late to class, as in less than a minute and it isn't due to just talking and dawdling in the hallway between classes. The student was taking care of real personal needs. Very serious. When that bell rings students should be in seats no exceptions.