This narrative review provides an overview of the research literature on the effectiveness of mnemonics in mathematics instruction for students with learning disabilities in a K-12 classroom. Eleven studies were identified in refereed journal articles and doctoral dissertations from 1975 to December 2018 that met the inclusion criteria. Overall findings of the studies on mnemonic strategies were positive to improve students' performance in mathematics instruction. Discussion of the findings and future research directions, limitations, and final thoughts on the importance of further study of mnemonics in mathematics instruction are presented.