Spaced practice, or the distribution of practice opportunities across time, is a well‐known and effective practice for improving retention. However, spaced practice is not effectively implemented in schools, perhapsl as a result of a lack of educationally relevant research in the area. We conducted an educationally relevant investigation of the spaced practice. Using a quasi‐experimental between‐subjects design, we taught 62 third‐ and fourth‐grade students eight math vocabulary words under two patterns of spaced practice (fixed interval and expanded interval) and massed practice. Results showed a benefit of spaced practice over massed practice, but no difference between fixed interval and expanded interval spaced practice. The findings suggest that spaced practice may be implemented to improve the retention of math vocabulary words; however, more research is needed to provide guidelines to support educators in implementing spaced practice in schools.

Distributed practice is often cited as a best practice for instruction, although research on the application of spaced practice to schools is limited. The impact of practice distributed across days and the impact of practice distributed within sessions were examined. Second and third grade participants (n = 88) were randomly assigned to practice eight spelling words in a massed or distributed fashion, both within sessions and across sessions. Retention was measured immediately and 28 days after the final practice sessions. No differences in immediate retention were observed. Retention after 28 days was greater when across‐session distributed practice was provided. These results suggested that practice distributed across weekly sessions was most beneficial.