In the 2014 study, "The Effects of Math Video Games on Learning," researchers examined the impacts of math video games on the fractions knowledge of 1,468 sixth-grade students in 23 schools. The video games focused on fractions concepts including: whole units, numerator and denominator, understanding the number line, fractions computation, and slope. Students played the games independently in a predetermined sequence over a 10-day period. Using a researcher-designed assessment, study authors found positive impacts on students' knowledge of fractions concepts. The study meets the What Works Clearinghouse (WWC) group design standards without reservations. Appended are: (1) Study Details; (2) Outcome measures for the mathematics achievement domain; and (3) Study findings for the mathematics achievement domain. A glossary of terms is included. [The following study is the focus of this Single Study Review: Chung, G. K. W. K., Choi, K., Baker, E., & Cai, L. (2014). "The effects of math video games on learning: A randomized evaluation study with innovative impact estimation techniques." National Center for Research on Evaluation, Standards, and Student Testing (CRESST), University of California, Los Angeles. http://bibliotheek.ehb.be:2190/fulltext/ED555700.pdf.]