<![CDATA[This study aims to analyze the cognitive load of students in chemistry learning and categorize the results based on grade levels. The research was conducted in the form of a survey using a quantitative approach during the second semester of the 2023/2024 academic year. The sample was taken using simple random sampling technique and consisted of 600 students from 10 public high schools and 5 private high schools from DKI Jakarta, Banten, West Java, and South Sumatra Province. The instrument used was a cognitive load questionnaire to measure two aspects of cognitive load: mental load and mental effort. Data analysis was performed using descriptive statistics and one-way ANOVA test. The findings indicate that the overall cognitive load of students is in the moderate category (M = 23.29), suggesting that most students can process the learning materials. Mental load (M = 2.92) was found to be slightly higher than mental effort (M = 2.90), implying that students experience greater cognitive demands in understanding concepts than in performing tasks. Grade X students showed the highest cognitive load, likely due to their novice-level understanding of abstract chemical concepts. The results also highlight that cognitive load can be managed and maintained at a moderate level through appropriate instructional strategies and supportive learning environments.]]>
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