<![CDATA[Teacher-centered instruction in elementary schools often limits students' opportunities for active interaction and communication. This study examined the effectiveness of smart board use in improving elementary students' social interaction and communication skills. A one-group pretest–posttest pre-experimental design was applied to 20 fourth-grade students at a public elementary school in Keliling Danau District, Kerinci Regency. The treatment comprised four thematic meetings on ecosystems, with data collected via a 1–5 observation scale (10 items per variable). Analyses included descriptive statistics, Shapiro–Wilk test, paired-samples t-test, Wilcoxon signed-rank test, effect sizes, and normalized gain. Mean social interaction scores increased from 28.50 to 41.05 and communication scores from 28.65 to 41.65 (both p < .001, very large effect sizes). Normalized gains were 60.2% and 63.0%, respectively (moderate category). Smart board use integrated into collaborative activities effectively improved both skills. Schools are advised to accompany device provision with training in collaborative lesson design.]]>
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