<![CDATA[Chemistry is often considered difficult by high school students because many of its concepts are abstract, technical, and require the retention of factual information. One fundamental topic that students need to master is the periodic table, as it supports their understanding of element symbols, element groups, periodic trends, and other chemistry concepts. This community service activity aimed to improve students’ understanding of the periodic table through mnemonic and visualization approaches. The activity was conducted at SMAN 2 Banjarbaru and involved 36 students from class X-6. The program consisted of interactive training on the Periodic System of Elements, a Chemical Elements BINGO game, and a short socialization session about the Chemistry Department. Students’ learning outcomes were evaluated using pre- and post-tests, while their responses to the activity were collected through a questionnaire. The average percentage of correct answers increased from 82.22% in the pre-test to 93.33% in the post-test, with an overall normalized gain (g) of 0.625, which falls within the medium category. A paired-samples t-test showed that the increase was statistically significant, t(35) = 2.76, p = 0.009, with a moderate effect size (Cohen’s dz = 0.46). Students also reported positive responses to the mnemonic method, visual learning media, and interactive learning process. These findings indicate that mnemonic and visualization approaches have the potential to support more engaging and interactive learning of the periodic table.]]>
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