This study examines the effect of timeline infographics on the history learning outcomes of 11th-grade students at SMA Negeri 1 Pekanbaru. The main research problem is students’ difficulty in understanding complex chronological sequences of events, which results in low learning achievement. The research method used was quantitative with a quasi-experimental design. Data were collected through pretests and posttests from the experimental and control groups, then analyzed statistically. The results indicate that the timeline infographic medium has a significant effect, contributing 68% to learning outcomes. Based on the N-Gain test, the effectiveness in the experimental group reached the moderate category (0.3 ≤ g < 0.7), while the control group was in the low category (16.5%). The conclusion of this study confirms that timeline infographic media is effective in improving history learning outcomes because it is able to visualize chronological information systematically and in a way that is easily understood by students.
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