<![CDATA[In the era of 21st century skills, increasing students' critical thinking and digital literacy is an educational priority. Observations made at SMAN 9 Malang show that this potential is not optimal. This research focuses on the Guided Inquiry-based Environmental Change Electronic Module to improve this ability. The main objective is to design, test the validity, practicality and effectiveness of the module. Using the Lee & Owen development model, quantitative data (validation, student response, pretest-posttest) and qualitative. Percentage analysis measures validity and practicality, while Ancova's test tests effectiveness. The results show that the module is valid, practical, and effective with validation results by subject matter experts at 100%, media and teaching materials at 100%, and field practitioners at 99%. The practicality test results by respondents amounted to 92.41%. The practicality test results by respondents amounted to 92.41%. The effectiveness test showed that there was an increase in the experimental class due to the results of the Ancova test with a difference value of 14.29 and that of the control class of 12.86. So it can be concluded that electronic modules are suitable for use as media and teaching materials.]]>
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