This set of policy statements is intended to provide guidance to those who evaluate and select assessments, prepare students for those assessments, administer and score the tests, and interpret and use assessment results to make decisions about students and schools. The focus is on large-scale assessments that have consequences for students and…

Twelve common errors which can invalidate an otherwise sound evaluation are identified, and ways to avoid them are presented. The hazards are: (1) grade-equivalent scores; (2) inappropriate statistical adjustments with nonequivalent control groups; (3) administering norm-referenced tests at inappropriate times of the school year; (4) inappropriate…