Quality assurance methods are seldom used in educational evaluations despite ample evidence of serious research implementation problems and data errors. In this paper a number of quality assurance methods are illustrated using evaluation data obtained from the Providence, Rhode Island, School District. The methods are as follows: (a) from auditing, the method of internal control; (b) from accounting, the method of double bookkeeping; and (c) from industrial quality control, the methods of acceptance sampling and of cumulative percentage charts. Methods like these are useful for identifying poor quality research and targeting efforts to improve quality.