"Accelerated Math®," published by Renaissance Learning, is a software tool that provides practice problems for students in grades K-12 and provides teachers with reports to monitor student progress. "Accelerated Math®" creates individualized student assignments, scores the assignments, and generates reports on student progress. The software is typically used with the math curriculum being used in the classroom to add practice for students and help teachers differentiate instruction through the program's progress-monitoring data. This review focuses on studies of the use of "Accelerated Math®" in kindergarten through pre-algebra classes. The What Works Clearinghouse (WWC) identified six studies of "Accelerated Math®" that both fall within the scope of the Primary Mathematics topic area and meet WWC group design standards. Two studies meet WWC group design standards without reservations, and four studies meet WWC group design standards with reservations. Together, these studies included 5,206 students in grades 2-9 in more than 223 classrooms across 27 states. According to the WWC review, the extent of evidence for "Accelerated Math®" on the mathematics test scores of students in primary mathematics courses was medium to large for the mathematics achievement domain, the only domain examined for studies reviewed under the Primary Mathematics topic area. A glossary of terms is provided.