<![CDATA[This study aimed to compare the impact of science, technology, engineering, and mathematics (STEM) and contextual approaches on students' motivations for learning and achievements in chemistry lessons focused on acid-base materials. A quasiexperimental design with a non-equivalent control group was used, and the participants were 66 students of class XI Science students from State Senior High School 1 (SMA N 1) Kalibawang. Data collection instruments included pre and post-questionnaires and test questions. The findings revealed significant differences in students' learning motivations and achievements between the STEM and contextual approaches to acid-base materials. Both approaches improved students' learning motivations, with the STEM approach yielding higher gains.]]>
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