Accelerated Reader is a progress-monitoring system that provides feedback on the comprehension of books and other materials that students have read. It also tracks student reading over time. Currently, more than 180,000 different Accelerated Reader quizzes have been developed and are in use. This report provides reliability and validity data for Accelerated Reader quizzes. The reliability analyses use a large database of nearly 1 million quiz records. Validity is established through correlations with scores from 24 standardized reading tests and through a study that confirms that the quizzes are effective at discriminating between instances of students having read the book versus not having read the book. The report also includes descriptions of the purpose and intended classroom use of Accelerated Reader, descriptions of the types of quizzes, and the processes for quiz development. The report is available online: <https://docs.renaissance.com/R35806>.

DETAILS: Location: 19 U.S. states, 1 Canadian province; Design: Correlational; Sample: 29 elementary, middle, and high schools; Measure: Library circulation measurements; Duration: Data spans 2-6 years. RESULTS: A number of research studies document the positive impact of Accelerated Reader on student reading achievement, motivation, and the amount of reading. One would expect that the combination of improved student motivation and teacher encouragement to read would affect library circulation. The purpose of this report was to review and summarize existing research on Accelerated Reader where library circulation was reported, which included 25 case studies, 3 journal articles, and 1 dissertation. The results showed that it is reasonable to conclude that students read more books while using Accelerated Reader, and are perhaps more motivated to read than before their schools implemented the program, so it can be expected that library circulation will increase. The full report is available online: <https://docs.renaissance.com/R37737>.