In David Johnson’s Signposts of Success, elementary schools are identified as “good” schools when they outperform other schools with similar socioeconomic characteristics. For example, if two schools have the same predicted test results based on having the same socioeconomic characteristics (such as percentage of students living in single-parent families, percentage of recent immigrants among students, and average household income), but one has higher actual test results, this school could be defined as a good school. What problems would arise if schools were ranked against all other schools based on actual test results without taking into account the socioeconomic characteristics of the school community?