From the day we begin school, we are constantly told to read and/or listen carefully to directions. We're not supposed to just plunge ahead, assuming we know what we are doing. This concept is a basic life lesson, applicable to more than just a Regents exam.
Working with the public in retail, I see on a daily basis how people of all age groups refuse to pay attention to directions. The end result is usually a product they are not happy with, as well as the embarrassment of having to be corrected by an employee for something they will later find was right in front of them.
Don't be one of those people. Remember the advice of your teachers: READ and/or LISTEN to directions carefully. Save yourself the time and embarrassment.