The InTASC Candidate Self-Perception Instrument (ICSPI) is an innovative, high-quality educational measurement tool designed to support the assessment and accreditation efforts of a wide variety of educator preparation programs (EPP). The procedures used for the creation and refining of items for the ICSPI are presented, including empirical estimates of reliability from a trial implementation across three semesters. Evidence of instrument validity is discussed, while observed reliability estimates were found to be above acceptable levels for all subgroups. The ICSPI can be used to evaluate EPPs' course offerings and requirements, align course outcomes with educational standards, provide data to advise programs of relative strengths and weaknesses, and improve teacher preparation.