<![CDATA[Basic laws of chemistry are fundamental concepts that are crucial for quantitative chemical analysis; however, students often face significant challenges due to gaps in prior knowledge and the demand for structured analytical thinking skills. This research aims to develop and evaluate the validity of a chemistry e-module based on Guided Inquiry Learning (GIL) integrated with the Teaching at The Right Level (TaRL) approach for Grade X Senior High School (Phase E). The research method used is Educational Design Research (EDR) employing the Plomp model, which focuses on the development phase through expert validation. The research instrument utilized feasibility validation sheets evaluated by 5 experts (validators) consisting of chemistry lecturers and high school chemistry teachers. Validity analysis quantified the data using the Aiken’s V formula. The results of the study indicate that: (1) the content feasibility component obtained an average of 0.897; (2) the linguistic component reached an average of 0.890; (3) the presentation component reached an average of 0.908; and (4) the graphical component obtained an average of 0.906. Overall, the e-module obtained an average Aiken’s V index of 0.900. This study concludes that the developed e-module meets the valid criteria and is ready to proceed to the field practicality trial stage.]]>
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