The present study aimed to investigate the effectiveness of metacognitive learning strategies in working memory among university students. This quasi-experimental research adopted a pretest-posttest control group design with follow-up. The statistical population included 268 students at Applied Sciences and Technology University in Tehran in 2022. The convenience sampling method was employed to select 30 students randomly assigned to two groups with 15 participants, i.e., the metacognitive training (experimental) and the control groups. The experimental group received 10 sessions of metacognitive strategy training based on the protocol of Wells (2011). Daneman and Carpenter's (1980) working memory test was conducted to collect data which were then analyzed using the repeated measures analysis of variance in SPSS. According to the findings, the pretest mean scores of the experimental group for storage and processing differed significantly from those of the posttest and follow-up stages (p<0.01). Furthermore, in terms of information storage and processing, there was a statistically significant difference between the mean scores of the experimental group and those of the control group (p<0.05). Thus, it can be stated that metacognitive learning strategies had a positive effect on improving the working memory of university students. University instructors can enhance students’ learning by creating conducive conditions for acquiring metacognitive strategies and fostering an engaging and appropriate educational environment.
