Purpose: The increasing use of digital technology in education has encouraged the integration of dynamic mathematics software in classroom instruction. Hawgent Dynamic Mathematics Software supports visualization and interactive exploration of mathematical concepts. However, empirical findings regarding its impact on students' mathematics achievement remain scattered across individual studies. This study aims to estimate the overall effect of Hawgent on mathematics achievement and examine whether its effectiveness varies across several contextual factors. Method: A meta-analysis was conducted to synthesize quantitative findings from previous studies. A systematic literature search identified 28 eligible studies published between 2016 and 2021, yielding 46 independent effect sizes involving 4,137 students from elementary to senior high school levels. Effect sizes were calculated using standardized mean differences and analyzed with Comprehensive Meta-Analysis software under a random-effects model. Moderator analyses examined publication year, educational level, sample size, teacher gender, duration of use, and mathematics topic.Findings: The results show that Hawgent has a statistically significant and very large positive effect on mathematics achievement, with an overall effect size of 2.11. No substantial publication bias was detected. Stronger effects were observed at the senior high school level, particularly in geometry and algebra, and when Hawgent was implemented for short instructional periods.Significance: This study provides integrated evidence on the instructional effectiveness of Hawgent and offers guidance for teachers on using dynamic mathematics software more effectively in mathematics instruction.