Show that you have a four-year college degree. In order to be hired as a PSSA scorer, you must have a minimum of a bachelor's degree in the subject area you want to score. Most of those hired are educational professionals with teaching degrees.
Check for job openings. Each year Pennsylvania's department of education advertises openings in state newspapers and on a variety of websites.
Interview for a position. At the interview, you will be asked to give writing and math samples and personal references. Preference is given to those with prior experience in grading assessment tests.