ISSN: 2782-893X
eISSN: 2799-0664
ISSN: 2782- 893X
— This study investigated the Joasian Method, an alternative technique for squaring 3-4 digit numbers with 0 as the middle digit, developed by Glaire M. Paglinawan. Conducted among Bachelor of Secondary Education majoring in Mathematics at Osmeña Colleges, the research aimed to assess the method’s effectiveness and efficiency. A pretest-posttest quasi-experimental design was used, involving 150 participants to answer the assessment tool and performance level scale that the researcher constructed. The researchers conducted a 20-30 minutes intervention of Joasian Method. The researchers used measures of variability and paired t-test as their statistical treatment. Results indicated significant improvements in both time consumed and scores achieved by respondents’ post-intervention. The mean time decreased from 22.71 to 11.79 minutes, shifting the performance level from “Developing” to “Competent,” while the mean score improved from 18.97 to 20, maintaining a “Proficient” level. A paired t-test confirmed the statistical significance of these improvements, with a t-value of 15.88 exceeding the critical value of ±1.976, leading to the rejection of the null hypothesis. The study concluded that the intervention led to a positive impact on the respondents’ performance, as evidenced by improvements in both time consumed and scores achieved. This indicated that there was a significant difference in the performance level of the respondents, considering the time consumed, before and after the intervention. Therefore, researchers recommended incorporating the method into mathematical education, promoting mastery through practice, and sharing the technique with broader audiences to aid those struggling with squaring numbers manually. Keywords — Efficiency, Alternative Method, Squaring Numbers, Quasi-Experimental